OpenAI hands developers the Codex harness for long-running agents
Most agent builders still spend their time keeping context, tools, subagents, and infrastructure from falling apart. OpenAI’s Agents API puts the Codex harness behind a managed public-beta service, supporting long-running sessions, code and file environments, orchestration, and asynchronous workloads. Early customers report evaluation gains from 0.71 to 0.85, 4x lower latency, and a 60% cut in cost per case.