It appears that OpenAI has blessed third party harnesses. I know they officially support OpenCode and they have this on their developer portal:
reply"Developers should code in the tools they prefer, whether that's Codex, OpenCode, Cline, pi, OpenClaw, or something else, and this program supports that work."
https://developers.openai.com/community/codex-for-oss
Obviously, the context is that OpenAI is telling open source developers who are using free subscriptions/tokens from the Codex for Open Source program that they can use any harness they want. But it would be strange for that to not extend to paying subscribers.
They have, but they also just announced this week that for business and enterprise plans, they’re switching from quotas for codex to token use based pricing, and I would expect that to eventually propagate to all their plans for all the same reasons.
replyI’d be surprised if that propagated to personal subscription plans, simply because it would put them at a huge competitive disadvantage against Anthropic, which they’ve already signaled they care about by saying they allow third-party harnesses. But I wouldn’t be surprised if they required third-party harnesses to use per-token billing, since that’d put them on par with Anthropic.
reply