Agents API is a bigger deal than it seems. OpenAI's bet on making the Codex harness open-source could pay off big time here. This harness-as…

Agents API is a bigger deal than it seems. OpenAI's bet on making the Codex harness open-source could pay off big time here. This harness-as-a-service idea hasn't hit mainstream yet, but some of the most serious builders are already adopting it to unlock new types of services. Codex being open-source means that many other models (open or closed) are already extremely knowledgeable about the Codex harness. As more services adopt these new agentic architectures, you'll want the compounding effect that comes with that transparency and openness. Today we're launching the Agents API, a brand new way to build Agents in the cloud, backed by the Codex harness. Bring along all your favorite tools and connectors, connect it to any sandbox, and let Astra cook. Can't wait to see what you whip up 👨‍🍳 https://openai.com/index/in…

I am bullish on simple agent harnesses. Love this idea from Vercel. fx is a new coding agent harness for model benchmarking, sandboxing, eva…
// Scaling Laws for Agent Harnesses // If you build agent harnesses, this one is worth your time. (bookmark it) Most harness tuning treats e…
Very interesting new work from Microsoft. (bookmark it) This work is related to this emerging theme of leveraging harnesses for model post-t…

Source: DAIR.AI (X) | 2026-09-11

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