Understand AI terms without the shorthand
This glossary expands specialist terms used across ChatGPT AI Hub. Each definition includes an evidence source and links to related practical guidance where available.
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.NET
Microsoft’s cross-platform development platform and runtime ecosystem. Definition source.
Why it matters: The generated workflow examples must preserve the project’s real language and toolchain rather than guessing from filenames.
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A
Advanced Audio Coding (AAC)
An audio encoding format that uses lossy compression. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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Agent Security
Workspace-level requirements for supported agent behaviour, managed execution networking, and tool use. Definition source.
Why it matters: It operates alongside, rather than automatically replacing, settings saved in an individual Codex Cloud environment.
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Related ChatGPT AI Hub pages
application programming interface (API)
A documented way for software systems to exchange requests and results. MDN: API.
Why it matters: APIs let applications use model, search, publishing, and analytics services programmatically.
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architectural decision record (ADR)
A record of a significant software-architecture decision, its context and consequences, maintained under the team’s decision process. Definition source.
Why it matters: A repository atlas may cite a pre-existing ADR but cannot make or approve a new architectural decision.
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artificial intelligence (AI)
An artificial system that solves tasks requiring human-like perception, cognition, planning, learning, communication or physical action. NIST artificial-intelligence glossary
Why it matters: A broad category that includes generative models and assistant products.
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artificial intelligence optimization (AIO)
The practice of structuring accurate, attributable content so artificial intelligence answer systems can discover, understand, and cite it. Definition source.
Why it matters: This site uses AIO as an editorial term; it is not presented as a formal industry standard.
Also known as: answer engine optimization
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B
Batch API
An asynchronous OpenAI API service that processes a file of requests within a documented completion window. Definition source.
Why it matters: It is intended for work that does not require an immediate response and returns separate output and error files.
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business associate agreement (BAA)
A contract that establishes required safeguards and responsibilities when a covered entity or business associate handles protected health information. Definition source.
Why it matters: Codex Cloud guidance explicitly states whether the service is covered by OpenAI’s BAA.
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C
cached input token
An input token reused through prompt caching and charged under the model provider’s current cached-input price rules. Definition source.
Why it matters: Caching can reduce repeat-processing cost, but eligibility and rates depend on the model and request conditions.
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Related ChatGPT AI Hub pages
call to action (CTA)
A prompt that asks a reader to take a specific next step, such as opening a resource or subscribing. Definition source.
Why it matters: A clear CTA connects useful content to an intended reader action.
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Cascading Style Sheets (CSS)
A language used to control the presentation and layout of web pages. Definition source.
Why it matters: CSS provides the visible styling and responsive behavior of glossary tooltips and article layouts.
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ChatGPT Deep Research
A ChatGPT research workflow in which a user can review a proposed plan, set available source boundaries, monitor progress, and receive a report with citations or source links that still require independent verification. Definition source.
Why it matters: Clarifies that a completed, cited report is input to a human provenance audit, not automatic approval.
Also known as: Deep Research
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ChatGPT dots
Gradually rolled-out, ongoing ChatGPT agents that OpenAI says run on GPT-6 Astra and have a cloud computer; plan, region, client, and administrator settings condition availability. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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ChatGPT Library
The ChatGPT collection for files uploaded to or created in normal chats; saved files can be reused in later chats and are deleted separately from the chat. Availability, retention and storage limits vary by plan and workspace. Definition source.
Why it matters: Distinguishes a saved, reusable file from its original conversation and from a connected file that stays in its outside service.
Also known as: Library in ChatGPT
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ChatGPT Page
An editable content surface in ChatGPT Space that can be shared with available view, comment, or edit roles; material copied onto a shared Page is visible to people who can read it. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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ChatGPT plugin
A packaged set of reusable guidance, reference material and, where supported, app connections; installing a plugin does not by itself grant app or provider data access. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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ChatGPT Space
A place where supported ChatGPT accounts can group related Pages and collaborate on work; actual access and sharing options depend on the account and workspace. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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ChatGPT Work
An agentic ChatGPT experience for longer, multi-step work and finished deliverables, distinct from regular Chat and Codex. Definition source.
Why it matters: Model access and cloud capabilities can depend on plan, workspace role, and rollout status.
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Related ChatGPT AI Hub pages
Codex Cloud
OpenAI-managed cloud environments where Codex can run coding tasks in isolated task workspaces. Definition source.
Why it matters: Reusable environments can package repositories, tools, dependencies, and access settings for new tasks.
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Comma-separated values (CSV)
A plain-text format for table-like records whose fields are separated by commas; quoting rules can protect commas and line breaks inside a field. Definition source.
Why it matters: Consultation exports need an explicit row, field, encoding and privacy check before any analysis.
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command-line interface (CLI)
A text-based interface for running commands and tools. Definition source.
Why it matters: Codex CLI controls must be interpreted against the installed version and documented approval settings.
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completion window
The configured time within which an asynchronous Batch API job is expected to finish or expire. Definition source.
Why it matters: The current Batch API documentation specifies a 24-hour completion window.
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Related ChatGPT AI Hub pages
conflict of interest
A situation in which a personal, financial, or organizational interest could impair, or appear to impair, impartial judgment. Definition source.
Why it matters: Procurement evaluators should disclose and resolve conflicts under the controlling process before reviewing proposals.
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consensus evaluation
A documented process in which individual evaluators discuss evidence and agree a collective assessment under approved rules. Definition source.
Why it matters: AI can organize evidence and draft meeting material, but people retain scoring and award authority.
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Related ChatGPT AI Hub pages
context window
The maximum amount of input and generated output a model can handle within one request under its documented limits. Definition source.
Why it matters: A large context window does not guarantee that every detail will be used correctly.
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Related ChatGPT AI Hub pages
continuous integration (CI)
A software-development practice that automatically integrates and tests changes in a shared repository. Definition source.
Why it matters: A controlled Codex workflow can investigate a failed CI run while keeping repository-write authority separate.
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Related ChatGPT AI Hub pages
Coordinated Universal Time (UTC)
The internationally agreed standard for world time, used here to identify the time reference in timestamps and offsets. Definition source.
Why it matters: A timestamp example with an offset must be distinguished from a claim about what a particular software version accepts.
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criterion weight
The approved share of an evaluation score assigned to a specific criterion. Definition source.
Why it matters: Weights must come from the governing rubric and should never be invented or changed by a model.
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custom GPT migration
OpenAI’s planned transition from a creator’s latest published custom GPT to a plugin; instructions, knowledge files and connected apps have documented destinations, while selected model, conversations, sharing and custom actions do not automatically transfer. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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custom_id
A unique identifier attached to each Batch API request so its result can be matched back to the original input. Definition source.
Why it matters: Batch outputs may arrive in a different order, making this identifier essential for reconciliation.
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Related ChatGPT AI Hub pages
D
Document Object Model (DOM)
A programming interface that represents a web document as a tree of nodes and objects so programs can inspect or change its structure, style and content. MDN definition.
Why it matters: Distinguish a page element target from a screenshot-only visual reference.
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Domain Name System (DNS)
A distributed naming system that associates domain names with resource records, including records used to obtain host addresses. RFC Editor definition.
Why it matters: Validate callback destination addresses rather than trusting a hostname once.
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dot context reset
A Dot deletion that removes its conversations, saved memories and scheduled tasks; separately stored files, Codex threads and ChatGPT conversations can remain and need separate review. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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E
environment variable
A named value supplied to a program through its runtime environment. Definition source.
Why it matters: In Codex Cloud, a direct environment variable is passed to programs and should be scoped to the minimum necessary task.
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Related ChatGPT AI Hub pages
error file
The Batch API output file that records requests that failed or expired. Definition source.
Why it matters: A reliable batch workflow reads both the successful output file and the error file before reporting completion.
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Related ChatGPT AI Hub pages
European Economic Area (EEA)
A single-market area comprising European Union countries together with Iceland, Liechtenstein and Norway. Definition source.
Why it matters: Explains the geographic shorthand when a product document distinguishes EEA eligibility from other territories.
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evaluation rubric
An approved set of criteria, weights, scales, and decision rules used to assess submitted material. Definition source.
Why it matters: A model can organize evidence against a rubric but must not create unstated criteria or make the final decision.
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Related ChatGPT AI Hub pages
evidence matrix
A structured table linking each evaluation criterion to cited supporting, missing, ambiguous, or contradictory source material. Definition source.
Why it matters: It supports traceability by showing what evidence underlies each provisional finding.
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Related ChatGPT AI Hub pages
F
false positive
A reported positive finding that a later check shows is not a genuine match; in code review this may be a flagged rule violation that the labeled fixture does not actually contain. Definition source.
Why it matters: The proposed Codex rule study should measure needless review work as well as true findings; no results are claimed until fixtures and outputs exist.
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Federal Risk and Authorization Management Program (FedRAMP)
A United States government-wide programme providing a standardised approach to the security and risk assessment of cloud products and services. Definition source.
Why it matters: An OpenAI product or workspace exclusion mentioning FedRAMP is an availability rule for that surface, not a statement that all government organisations are excluded.
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File Search
An OpenAI Responses API tool that can search uploaded files held in a vector store and return file citations; retrieval and citation are not proof that a generated claim is accurate. Definition source.
Why it matters: Names the hosted retrieval step in a source-ID and excerpt-led evidence packet.
Also known as: Responses File Search
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Free Lossless Audio Codec (FLAC)
An audio encoding format and associated container designed to compress audio without loss of fidelity. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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frequently asked questions (FAQ)
A collection of recurring questions and concise answers about a subject. Definition source.
Why it matters: An FAQ improves navigation but should link to fuller evidence where details or exceptions matter.
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G
Graphics Interchange Format (GIF)
A palette-based image file format that can store still images or short animations. A successful file upload does not itself prove that writing in an image was read accurately. Definition source.
Why it matters: The Study tutorial names a non-animated GIF as one permitted image file type, but still requires literal page verification.
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generative pre-trained transformer (GPT)
A family of transformer-based language models trained to generate and analyse content. Definition source.
Why it matters: GPT models power many ChatGPT and API capabilities.
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gigabytes (GB)
A data-size unit; by the international decimal convention one gigabyte is one billion bytes. A gibibyte is a distinct binary unit of 2^30 bytes, and software may use differing display conventions. Definition source.
Why it matters: Prevents an uploaded-file size example from implying a provider-specific quota or counting convention.
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GPT-5.5 Instant Mini
A ChatGPT fallback after a user hits GPT-5.5 Instant or Auto rate limits, according to OpenAI’s 6 July 2026 release notes. It is not shown in the ChatGPT model picker; that update does not affect the API or Codex. Definition source.
Why it matters: Prevents confusing a documented ChatGPT fallback with a selectable API model or a Codex fallback.
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GPT-6.1 Sol
An OpenAI model documented for complex coding, computer use, and professional work across eligible product and API surfaces. Definition source.
Why it matters: Its access, pricing, features, and limits should be checked against current documentation.
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Related ChatGPT AI Hub pages
gross domestic product (GDP)
The market value of final goods and services produced within a country during a stated period. Definition source.
Why it matters: Economic comparisons need a dated source and should not be treated as a direct measure of model quality.
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ground-truth label
A human-reviewed reference label used as the expected result when evaluating a classifier. Definition source.
Why it matters: Representative labels make it possible to measure errors before applying a classifier at scale.
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H
holdout set
A collection of representative examples kept separate from prompt or workflow development and used for evaluation. Definition source.
Why it matters: Testing on a holdout set helps reveal whether a classifier generalizes beyond the examples used to design it.
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human merge gate
A repository control that requires an authorized reviewer to approve a proposed code change before it is merged. Definition source.
Why it matters: Codex can propose a patch, but the merge decision remains with people and repository policy.
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human-in-the-loop review
A control in which an accountable person reviews model output before it can affect a consequential decision or system. Definition source.
Why it matters: It is essential when output is uncertain, sensitive, legally significant, or operationally irreversible.
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Related ChatGPT AI Hub pages
HyperText Markup Language (HTML)
The standard markup language used to structure content on web pages. Definition source.
Why it matters: Semantic HTML helps readers, assistive technology, search engines, and AI agents interpret articles.
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Hypertext Transfer Protocol (HTTP)
A standard request-and-response protocol for exchanging representations and related metadata between web clients and servers. Definition source.
Why it matters: HTTP transport describes a connection mechanism, not the authority or permissions of the connected tool.
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Hypertext Transfer Protocol Secure (HTTPS)
The encrypted form of web communication protected with Transport Layer Security. Definition source.
Why it matters: Encrypted transport is one layer of access control; it does not replace authorisation or secret governance.
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I
identifier (ID)
A value used to distinguish one record, task, source or object from another. Definition source.
Why it matters: Stable identifiers support reconciliation, audit trails and source-level verification.
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inherited Space access
Access to a Page that comes from a parent Page or Space rather than a direct invitation; removing a direct invite does not remove access still inherited from the parent. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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integrated development environment (IDE)
A software application combining tools for writing, building, testing and debugging code. Definition source.
Why it matters: An IDE extension is a different interface from the Codex terminal or web service.
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Internet Protocol (IP)
A network protocol that carries datagrams across interconnected networks using addresses to route them towards their destination. RFC Editor definition.
Why it matters: Inspect resolved network addresses separately from a callback URL.
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J
Joint Photographic Experts Group (JPEG)
JPEG is a widely used compressed still-image format named after the Joint Photographic Experts Group committee that developed the standard. JPEG photos commonly have a .jpeg or .jpg filename extension; the two extensions do not imply different photographic standards. Definition source.
Why it matters: A clear photograph may replace an unreadable scanned page only after the learner checks its actual characters and diagrams.
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JavaScript Object Notation (JSON)
A text format for representing structured data as objects, arrays, numbers, strings, and other values. Definition source.
Why it matters: JSON is commonly used by APIs, manifests, and structured-data systems.
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JavaScript Object Notation Remote Procedure Call (JSON-RPC)
A stateless, lightweight remote procedure call (RPC) protocol that uses JavaScript Object Notation (JSON) as its data format. Definition source.
Why it matters: OpenAI describes its Codex App Server as using a “JSON-RPC lite” variant that keeps request, response, and notification shapes but omits the required JSON-RPC 2.0 header, so that variant should not be described as strict JSON-RPC 2.0 compliance.
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JSON Lines (JSONL)
A text format containing one valid JavaScript Object Notation value per line. Definition source.
Why it matters: The Batch API accepts request files in this format and returns line-oriented results.
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Related ChatGPT AI Hub pages
JSON Schema
A vocabulary for describing and validating the expected structure of JavaScript Object Notation data. Definition source.
Why it matters: OpenAI Structured Outputs uses a supported subset to constrain response shape.
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Related ChatGPT AI Hub pages
K
key performance indicator (KPI)
A defined measure of progress towards an intended result. The owner should specify its calculation, period and source so that an unchanged label is not mistaken for an unchanged measure. Definition source.
Why it matters: Board-presentation figures require approved definitions and periods, not a plausible AI-generated label.
Also known as: KPIs, key performance indicators
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Keyed-hash message authentication code (HMAC)
A mechanism for authenticating a message using a cryptographic hash function and a shared secret key. It is not encryption or a grant of resource access. RFC Editor definition.
Why it matters: Keep message-authentication checks distinct from subscription and document permissions.
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Kibibyte (KiB)
A binary data unit equal to 1,024 bytes. It is distinct from a decimal kilobyte of 1,000 bytes. NIST definition.
Why it matters: Interpret documented payload-size limits without confusing binary and decimal units.
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L
large language model (LLM)
A machine-learning model trained on large text collections to understand and generate language. Definition source.
Why it matters: LLMs can draft, analyze, classify, and transform content, but their output requires verification.
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least privilege
The security principle of granting only the permissions required for a task and no broader access. Definition source.
Why it matters: A CI remediation job can remain read-only while a separate job holds the limited permission needed to open a pull request.
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Related ChatGPT AI Hub pages
linked versus copied Page content
A link to a file keeps its own source permissions, while text or summaries copied onto a shared Page can be read by its Page collaborators. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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M
mandatory requirement
A solicitation condition that a proposal must satisfy under the governing procurement rules. Definition source.
Why it matters: Models should identify supplied evidence and gaps but should not determine legal responsiveness without authorized human review.
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Related ChatGPT AI Hub pages
megabytes (MB)
A file-size unit based on bytes; under the international decimal convention one megabyte equals one million bytes, while some software uses different binary conventions. Definition source.
Why it matters: Treat a provider’s stated MB file limit as approximate unless its documentation specifies the counting convention.
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Model Context Protocol (MCP)
A protocol for connecting artificial intelligence applications with tools and data sources through defined interfaces. Definition source.
Why it matters: Authentication and scope controls still apply to every connected service.
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model snapshot
A dated or otherwise fixed model version used to make behaviour more reproducible over time. Definition source.
Why it matters: Recording a snapshot helps teams detect changes and rerun representative evaluations.
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Related ChatGPT AI Hub pages
Moving Picture Experts Group (MPEG)
The group whose name is used for a family of audio and video coding and container standards. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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MPEG-1 Audio Layer III (MP3)
An audio encoding format commonly used in files with the .mp3 filename extension. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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MPEG-4 audio file extension (M4A)
A filename extension used for audio in MPEG-4 containers; it is an extension label, not a separate audio codec. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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MPEG-4 container (MP4)
A media container that can hold audio and video tracks; the container name alone does not identify its contents. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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N
network secret
A credential that Codex Cloud substitutes through a proxy for allowed HTTPS destinations instead of exposing the raw value locally. Definition source.
Why it matters: Destination restrictions and the environment’s authorization still require independent review.
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Related ChatGPT AI Hub pages
O
Ogg audio file extension (OGA)
The .oga filename extension for audio in an Ogg container; this extension label is not a separate codec. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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Ogg container label (OGG)
A media container name commonly used with .ogg audio files; Ogg is a name rather than an expanded acronym. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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Open-source software (OSS)
Software distributed under a licence that permits use, modification and redistribution under its stated terms. Open Source Initiative: Open Source Definition.
Why it matters: Identify the mechanism or licensing category without assuming implementation quality, security or provider compatibility.
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P
Portable Network Graphics (PNG)
An image file format for losslessly compressed raster pictures, including pictures with transparent areas. It is not proof that an uploaded page is legible to a model. Definition source.
Why it matters: The Study tutorial accepts clear PNG photos as one route for rechecking a failed handwritten page.
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patch artifact
A saved representation of proposed file changes that can be reviewed and applied in a later workflow step. Definition source.
Why it matters: Separating patch creation from repository write permissions reduces the authority of the AI-bearing job.
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Personal vault
A Codex Cloud area where each user stores personal environment variables or network secrets for environments that request them. Definition source.
Why it matters: Sharing an environment can share required key names without transferring another user’s stored values.
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Related ChatGPT AI Hub pages
Portable Document Format (PDF)
A fixed-layout document format used to preserve page appearance across systems. Adobe: What is a PDF? Portable Document Format.
Why it matters: Scanned or visually complex PDF files can require manual verification because text extraction may be incomplete.
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precision
The share of reported positive findings that are actually positive in the labeled evaluation set; it depends on the evaluation task and annotation rules. Definition source.
Why it matters: A proposed code-review measurement must declare its labeled fixtures and scoring rubric before comparing review conditions.
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proactive read-only research
A constrained Dots research mode for permitted connected sources; its tools cannot directly send messages, change connected content, or control a browser or desktop. Definition source.
Why it matters: CE115 source-grounded product and workflow explanations.
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prompt injection
An attempt to manipulate an AI system through untrusted instructions embedded in content, data, or tool output. Definition source.
Why it matters: Repository text and pull-request metadata should be treated as untrusted input in automation.
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Related ChatGPT AI Hub pages
protected health information (PHI)
Individually identifiable health information protected under applicable United States health-information rules. Definition source.
Why it matters: The cited Codex Cloud guidance says not to process PHI where the service is not covered by OpenAI’s BAA.
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provisional score
A tentative evaluation score that remains subject to evidence checking, evaluator calibration, and authorized approval. Definition source.
Why it matters: A model-generated score must never be treated as a final procurement determination.
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Related ChatGPT AI Hub pages
pseudonymisation
Replacing, removing or transforming direct identifiers and keeping the information needed to reconnect them separately; the resulting record can still be personal data. Definition source.
Why it matters: A respondent ID is not a guarantee of anonymity; authorize the environment and control the separately held identity key.
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published environment
A Codex Cloud setup whose prepared filesystem is captured for use by new tasks. Definition source.
Why it matters: Republishing updates the reusable setup for new tasks while existing tasks retain their own state.
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Related ChatGPT AI Hub pages
pull request (PR)
A proposed set of repository changes submitted for review before integration. Definition source.
Why it matters: The controlled write job may create a pull request, but a human remains responsible for merge approval.
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Pulse code modulation (PCM)
A way of representing an audio signal as sampled numerical values. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
Sources
Q
qualitative codebook
A documented set of topic or theme codes used to classify qualitative responses consistently, with meanings and application decisions reviewed by researchers. Definition source.
Why it matters: Consultation themes require source IDs, counterexamples and human checking; a code count is not automatically an estimate of public opinion.
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quality assurance (QA)
Planned and systematic activities that provide confidence that quality requirements will be fulfilled. Definition source.
Why it matters: Content and software releases require evidence-led checks before publication or deployment.
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R
read-only sandbox
An execution boundary that restricts local filesystem changes during Codex work; it does not independently establish factual accuracy or make all data sharing safe. Definition source.
Why it matters: An atlas tutorial can use the read-only setting and still requires review of external access, sensitive source content and any shell-created output file.
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Really Simple Syndication (RSS)
A standardized web-feed format that lets software retrieve newly published or updated content. Definition source.
Why it matters: RSS helps readers and automated systems discover new articles.
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reasoning effort
A model setting that controls how much reasoning computation the provider allows for a response. Definition source.
Why it matters: Higher effort can change quality, latency, and token use and should be selected through representative evaluation.
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recall
The share of actual positive examples identified as positive in a labeled evaluation set; high recall alone does not describe false-alarm burden. Definition source.
Why it matters: A Codex rule study should pair detected violations with clean-case checks and reviewer effort, not declare a winner from recall alone.
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reference photo
A photo saved in ChatGPT Personalization for reuse in supported shopping try-on experiences; the reference-photo control is separate from chat, saved images, and training settings. Definition source.
Why it matters: Review saved photo, conversation and model-improvement controls separately before uploading an identifying image.
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repository introductory file (README)
A file explaining what a repository project does, how to get started and where to find help; GitHub commonly surfaces it to repository visitors. Definition source.
Why it matters: Check this file against actual code and commands during repository onboarding rather than treating it as infallible.
Also known as: README.md
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repository permission
An authorization granted by a source-control platform to read or change repository resources. Definition source.
Why it matters: Access to a shared Codex environment does not automatically grant repository permissions.
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representational state transfer (REST)
An architectural style for web application interfaces; REST-based interfaces use resource representations and standard web request methods. Definition source.
Why it matters: Explains a technical web-interface term in a fictional Codex bug reproduction without claiming a particular endpoint exists.
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request for proposal (RFP)
A formal solicitation asking suppliers to submit proposals against stated requirements and evaluation criteria. Definition source.
Why it matters: The final approved solicitation and addenda define the evidence boundary for an evaluation workflow.
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Related ChatGPT AI Hub pages
Responses API
An OpenAI application programming interface for generating model responses and using supported tools. Definition source.
Why it matters: Current OpenAI model pages identify which models and tool capabilities are supported on this endpoint.
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Related ChatGPT AI Hub pages
responsive proposal
A proposal determined under the governing rules to meet applicable solicitation requirements. Definition source.
Why it matters: This status is a human procurement or legal determination, not a conclusion a language model should make autonomously.
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Related ChatGPT AI Hub pages
role-based access control (RBAC)
A method of assigning permissions through defined roles rather than one person at a time. Definition source.
Why it matters: Workspace model and feature access can depend on the member’s assigned role.
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Related ChatGPT AI Hub pages
S
saved virtual-machine state (saved VM state)
The retained files and installed tools associated with an existing Codex Cloud task for the documented recovery period. Definition source.
Why it matters: It does not replace version control, backup, or a retention policy.
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search engine optimization (SEO)
The practice of improving a website’s technical accessibility, relevance, and usefulness for organic search discovery. Definition source.
Why it matters: SEO work includes source-grounded content, site structure, metadata, links, and performance.
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Secure Hash Algorithm (SHA)
A family of cryptographic hash algorithms standardised for producing fixed-length message digests. Definition source.
Why it matters: A recorded SHA-256 digest helps verify that a patch artifact has not changed between jobs.
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Secure Shell (SSH)
A protocol for secure remote login and other secure network services over an insecure network. Definition source.
Why it matters: A remote host has its own authenticated connection and local resources; knowing the protocol name does not grant access to that host.
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Security Assertion Markup Language (SAML)
An OASIS standard for exchanging assertions about authentication, attributes and authorisation between systems. OASIS standard.
Why it matters: Preserve the approved identity requirement when editing a proposal; identifying the standard does not establish a system’s compliance.
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separation of duties
A control that divides sensitive capabilities among distinct roles or workflow stages. Definition source.
Why it matters: A read-only Codex job can generate a patch while a separate job has the permission to open a pull request.
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Server Name Indication (SNI)
A TLS extension through which a client can provide the hostname of the server it is contacting, including on a shared network address. RFC Editor definition.
Why it matters: Keep the intended hostname during certificate-checked callback connections.
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Server-sent events (SSE)
A mechanism through which a server sends new data to a web page as messages over an established connection. MDN: Server-sent events.
Why it matters: Identify the mechanism or licensing category without assuming implementation quality, security or provider compatibility.
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Server-side request forgery (SSRF)
An attack that abuses an application to interact with an internal or external network, or with the machine itself. OWASP definition.
Why it matters: A webhook callback address is input that requires deliberate destination validation.
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service-level agreement (SLA)
A service-specific agreement that states covered services, service-level objectives and the applicable remedy or exclusions; it is not the same thing as a status-page snapshot. Definition source.
Why it matters: Availability decisions should be based on the actual applicable agreement and observed service behaviour, not a status badge alone.
Also known as: Service level agreement
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service-level objective (SLO)
A target value or range for a service level, measured by a defined service-level indicator, such as a request-success rate or response-time measure. Definition source.
Why it matters: The Space masterclass uses this term in an example service-reliability decision packet.
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shared ChatGPT Project
Why it matters: CE115 source-grounded product and workflow explanations.
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single sign-on (SSO)
A sign-in arrangement in which a user authenticates once through an identity provider to reach multiple applications; each application still determines the user’s allowed access. Definition source.
Why it matters: Explains authentication terminology without treating sign-in as permission to a repository or workspace.
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software development kit (SDK)
A collection of libraries, tools and documentation for building against a platform. Definition source.
Why it matters: An SDK can simplify API integration but does not remove the need to verify requests and outputs.
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solicitation addendum
An authorized amendment or clarification that becomes part of the solicitation record. Definition source.
Why it matters: Evaluators should confirm that every proposal is assessed against the same final approved addenda.
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Related ChatGPT AI Hub pages
source register
A controlled list of the authoritative documents, versions, dates, and identifiers used in an evaluation. Definition source.
Why it matters: It prevents an AI-assisted review from silently mixing drafts or unapproved external material.
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standard input/output (STDIO)
The standard input and output streams that allow a client to exchange protocol messages with a locally launched server process. Definition source.
Why it matters: A local-process transport differs from a remote HTTP server in execution location and access control.
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Static application security testing (SAST)
Analysis of source code or compiled code to help identify security flaws. A reported result still needs assessment rather than being treated as proof of security. OWASP definition.
Why it matters: Distinguish code-analysis findings from confirmed vulnerabilities and human security review.
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Structured Outputs
An OpenAI feature that constrains a model response to a supplied supported JavaScript Object Notation schema. Definition source.
Why it matters: It improves format reliability but does not guarantee that the values are true or appropriate.
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System Package Data Exchange (SPDX)
An open standard for communicating information about system components. Its short-form licence identifiers provide a standard way to state licence information in source-code or documentation files. SPDX project overview; SPDX identifier documentation.
Why it matters: Preserve a recorded licence identifier or expression exactly and refer its interpretation and applicability to a named human reviewer. A short identifier is not itself a legal opinion or redistribution approval.
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T
task workspace
The isolated files and runtime state associated with one Codex Cloud task. Definition source.
Why it matters: Environment sharing does not grant access to another person’s task workspace.
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taxonomy
An agreed classification system of categories and definitions. Definition source.
Why it matters: A ticket classifier needs a stable taxonomy and rules for ambiguous or multi-issue records.
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terminal user interface (TUI)
A user interface accessed through a terminal. OpenAI says Codex CLI started as a TUI (terminal user interface), meaning Codex is accessed through the terminal. Definition source
Why it matters: This distinguishes a terminal-based interface from a graphical interface when reading documentation about developer tools.
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time to live (TTL)
A configured lifetime after which cached or networked data is treated as expired. Definition source.
Why it matters: Caching guidance must preserve the provider-documented lifetime and scope.
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total cost of ownership (TCO)
The complete cost of operating a system, including usage, tools, retries, labour, controls, and maintenance. Definition source.
Why it matters: Token prices alone do not determine the total cost of a model workflow.
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Transport Layer Security (TLS)
A protocol that lets client/server applications communicate over the Internet in a way designed to prevent eavesdropping, tampering, and message forgery. Definition source.
Why it matters: TLS protects a client/server transport channel; RFC 9846 is the current TLS 1.3 specification and obsoletes RFC 8446.
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trusted trigger
An automation event restricted to approved actors, repositories, branches, or conditions. Definition source.
Why it matters: Trusted triggers reduce the chance that unreviewed repository content can invoke a privileged workflow.
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U
Uniform Resource Locator (URL)
The address used to identify and access a resource on the web. Definition source.
Why it matters: Canonical URLs help systems identify the preferred location of an article or source.
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United Kingdom (UK)
The United Kingdom, abbreviated UK. OpenAI lists its Dots availability separately from the European Economic Area and Switzerland. Definition source.
Why it matters: The Dots rollout guidance distinguishes United Kingdom access from European Economic Area and Swiss availability.
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user interface (UI)
The controls and visual surfaces through which a person interacts with software. Nielsen Norman Group: What Is User Experience (and What Is It Not)?.
Why it matters: Product access and settings can differ between a user interface and an API.
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V
virtual machine (VM)
A software-defined computing environment that runs an operating system and applications. Definition source.
Why it matters: Saved Codex task state is not equivalent to a durable backup or records system.
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virtual private network (VPN)
A protected logical connection that carries traffic across another network. Definition source.
Why it matters: A VPN can restrict or route access but does not itself prove that a workload is authorised.
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virtual try-on
An image-based shopping preview that places a pictured garment or accessory on an uploaded or captured image; the preview does not guarantee real-world fit, size or exact appearance. Definition source.
Why it matters: Shopping readers should inspect seller specifications and policies instead of treating an AI image as a fitting-room measurement.
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W
Waveform Audio File Format (WAV)
An audio container format, commonly identified by the .wav filename extension. Definition source.
Why it matters: File names and encoding labels help interpret audio evidence, but do not by themselves prove that a file can be decoded or uploaded to a particular service.
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Web Content Accessibility Guidelines (WCAG)
The World Wide Web Consortium guidance on making web content accessible to people with disabilities, with testable success criteria across several accessibility needs. Mentioning the guidelines does not by itself establish conformance. Definition source.
Why it matters: The keyboard-regression prompt collection requires witnessed keyboard behaviour and human review rather than an unsupported compliance claim.
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Windows Subsystem for Linux (WSL)
A Windows feature that lets you run a Linux environment on a Windows machine without a separate virtual machine or dual booting. Definition source.
Why it matters: WSL is useful when a workflow needs Linux command-line tools while the developer continues to use Windows.
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Y
YAML Ain’t Markup Language (YAML)
A human-readable data-serialization language often used for configuration files. Definition source.
Why it matters: Workflow files written in YAML must be parsed and validated rather than treated as plain prose.
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Z
Zero Data Retention (ZDR)
An OpenAI API data-control option requiring prior approval; it excludes customer content from abuse-monitoring logs under documented limitations, but some features can still persist application state. Definition source.
Why it matters: ZDR is not a blanket guarantee of zero processing, retention or third-party storage for every endpoint or app.
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