OpenAI launches Agents API in public beta, packaging the Codex harness for developers

OpenAI 发布 Agents API 公测版

OpenAI released the Agents API in public beta, exposing the harness and infrastructure behind Codex as a managed service. A single API call spins up a cloud agent that can run for days, with model, tools, and compute environment all configurable. You pick the environment: OpenAI-hosted sandbox, your own infra, or a sandbox partner. The harness handles long-session context, tool-use efficiency, and parallel subagent orchestration. Early user Ciridae reports a 4x latency drop and eval score jump from 0.71 to 0.85 after adopting subagent support. SafetyKit saw 60% lower cost per case, lower latency, and better token efficiency. The post does not disclose pricing or regional availability.

Why it matters: OpenAI productizing Codex's agent orchestration as a managed API in public beta is a major product release. All three HKR axes hit: novel product shape, concrete technical details, and it directly addresses agent developers' infrastructure pain. Deduction: it's public beta, an...