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Introducing the Agents API

OpenAI LLM Agents 2026-09-10

TL;DR - OpenAI introduced the Agents API, a managed service for building and deploying cloud-based agents. Powered by the Codex harness, it supports orchestration, persistent long-running sessions, and tool use.

Provides managed infrastructure for launching cloud agents.
Uses the Codex harness to orchestrate agent workflows.
Supports long-running sessions for tasks that extend beyond a single interaction.
Enables agents to use tools while executing tasks.

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