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. Agents can operate in a sandbox where they can execute code, edit files, connect to MCP servers, and produce artifacts. Model usage is billed at the selected model’s API rates. OpenAI tools use their standard rates, and OpenAI-hosted sandboxes use stand...