AgentsSeptember 10, 2026via MarkTechPost
OpenAI Launches the Agents API in Public Beta, Putting the Codex Harness Behind One API Call
Why it matters
OpenAI is commoditizing agent deployment. The Agents API puts enterprise-grade agent infrastructure—the same harness that powers their internal Codex work—into the hands of any developer, with flexible hosting options (managed, on-prem, or partner). This is a competitive move to make agent-building as frictionless as calling an LLM.
Key signals
- Agents API in public beta; live for all developers now
- Uses the same harness and infrastructure that powers OpenAI's internal Codex work
- Three deployment options: OpenAI-managed sandbox, developer's own infrastructure, or partner sandbox
- OpenAI hosts and maintains the harness; developers manage compute placement
- Published Sep 10, 2026
The hook
OpenAI just open-sourced its agent infrastructure. Developers can now deploy autonomous systems in OpenAI's sandbox, their own stack, or a partner's—all behind one API call.
OpenAI has released the Agents API in public beta. It gives developers the same harness and infrastructure that run Codex. OpenAI hosts and maintains the harness. Developers run the agent’s compute in an OpenAI-managed sandbox, their own infrastructure, or a partner sandbox. Is it deployable? Yes. I…