
OpenAI Just Gave Every Developer the Same Harness That Runs Codex
OpenAI put its Agents API into public beta, exposing the managed harness behind Codex as a service any developer can call. One API call creates a production agent with a model, instructions, tools, MCP servers and an optional sandbox environment, and OpenAI handles the hard parts: durable sessions that survive for days, context compaction, tool orchestration and subagent fan-out. There is no extra API fee beyond model tokens and paid tools. The interesting shift is that agent infrastructure, the thing every startup has been rebuilding from scratch for two years, is now a commodity layer.








