O

Agents API

API service

by OpenAI

Managed API that gives an application the Codex harness: OpenAI runs sessions, orchestration, context compaction and recovery while the application supplies tools and picks a sandbox where agents execute code, edit files, connect to MCP servers and produce artifacts.

Find alternatives to Agents API

What it does

• Agent orchestration

Sources

Pricing

Official documentation · 18 Oct 2026

"Model usage is billed at the selected model's API rates. OpenAI tools use their standard rates, and OpenAI-hosted sandboxes use standard container rates."

Description

Official documentation · 18 Oct 2026

"The Agents API gives your application access to the Codex harness through an OpenAI-managed API. OpenAI manages sessions, orchestration, context compaction, and recovery while your application provides tools and chooses its execution environment."

What it does

Official documentation · 18 Oct 2026

"Agents can operate in a sandbox where they can execute code, edit files, connect to MCP servers, and produce artifacts."

Sold within

Official documentation · 18 Oct 2026

Part of the OpenAI API: "Model usage is billed at the selected model's API rates."

Name

Official documentation · 18 Oct 2026

Page title "Agents API".

URL

Official documentation · 18 Oct 2026

OpenAI's own developer documentation.

Deployment

Official documentation · 18 Oct 2026

"OpenAI manages sessions, orchestration"; OpenAI-hosted sandboxes (self-hosted sandboxes are also documented).

Interfaces

Official documentation · 18 Oct 2026

"See the API reference for endpoints, request parameters, and response fields."

Intended for

Official documentation · 18 Oct 2026

Written for developers building agent applications.

Also from OpenAI

• ChatGPT Application

  Assistant for chat, web search, file analysis and image generation, used in the browser and in desktop and mobile apps; developers can build custom in-chat apps for it via the Apps SDK, built on the Model Context Protocol.

• ChatGPT for Word Application

  ChatGPT in a Microsoft Word sidebar: drafts, revises and reorganizes the open document from notes or pasted source text, pulling in context from connected apps like Outlook, SharePoint, Google Workspace and Dropbox.

• ChatGPT for Excel Application

  ChatGPT in the Excel ribbon: builds and edits spreadsheets, formulas and formatting from plain-language requests, answers questions about what is in the workbook, and asks permission before changing it. OpenAI's own page bundles this with a separate ChatGPT for Google Sheets add-in; this record covers the Excel add-in only.

• ChatGPT for PowerPoint Application

  ChatGPT in the PowerPoint ribbon: creates new slides, rewrites and restructures an existing deck, and turns notes, documents or spreadsheets into presentation-ready content while keeping the output editable in PowerPoint.

• OpenAI API Model API

  Hosted API for OpenAI's text, image, audio and embedding models, billed per token.

• ChatGPT Atlas Application

  OpenAI's agentic web browser. Deprecated on 9 August 2026, with its browser-based agentic capabilities moved into ChatGPT and Codex.

• ChatGPT Gov Application

  A version of ChatGPT that US government agencies deploy in their own Microsoft Azure commercial or Azure Government cloud, so the agency manages its own security, privacy and compliance.

• Codex AI agent

  Coding agent that reads, edits and runs a codebase from the terminal, an IDE extension and the ChatGPT web app.

• OpenAI Daybreak Agent platform

  OpenAI's cybersecurity offering, bringing together frontier cyber models, Codex Security and partner workflows to find, validate and fix vulnerabilities, with an access-gated Daybreak Red tier for authorised vulnerability research and red teaming.

• OpenAI Frontier Agent platform

  Enterprise platform for connecting AI agents to systems of record and running them under enterprise identity, access and observability controls.

• Sora Application

  OpenAI's text-to-video product. The web and app experiences were discontinued on 26 April 2026; OpenAI's deprecations page lists the Sora 2 models and Videos API for removal from the API on 24 September 2026, a date now passed.

• dots AI agent

  Always-on personal agents inside ChatGPT, each with its own cloud computer, that learn from feedback and work toward a user's goals around the clock; one is included with Pro and Business Premium.

• ChatGPT Space Application

  Shared workspace in ChatGPT for pages and uploaded files that a user edits together with teammates, ChatGPT and their dot; replaced Library on Pro, Business and Enterprise plans.

• Codex Security AI agent

  Codex Security is an application security agent that helps teams find, confirm, and fix vulnerabilities.

• ChatGPT Work AI agent

  Mode of ChatGPT for delegating substantial tasks such as briefs, decks, analyses, recurring updates and workflows: it works from the user's files, plugins and approved tools, can use local files, apps and the browser in the desktop app, and returns finished files for review.

Open OpenAI in the directory

Something wrong here? Send a correction — quote this product id: openai-agents-api.