OpenAI has launched the Agents API in public beta, allowing developers to utilize the Codex harness and infrastructure via a single API call with flexible…
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OpenAI launched the Agents API in public beta on September 10. It lets developers create cloud agents by supplying a task, model, tools, and compute environment in one API call. OpenAI hosts the harness, while the agent can run in an OpenAI sandbox, on the developer's own infrastructure, or with partner environments such as Cloudflare, Modal, and Vercel. The API adds context compaction for long sessions, tool search, parallel programmatic tool calls, and multi-agent support. OpenAI says the API has no extra fee during the beta, but token and tool usage still costs money. The useful split is between orchestration and execution. Teams can reuse the Codex harness without putting every file, secret, or runtime inside OpenAI's sandbox. The production question is how carefully they set those bou
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