Enterprise teams can now use open models like GLM-5.3 Flash and Kimi K3 natively in Codex and count spend against their OpenAI commit.
Baseten
@baseten
Sep 29
Article

Announcing our partnership with OpenAI

We’re excited to partner with OpenAI as one of the first open-model inference providers in the OpenAI B2B Marketplace, including a native integration within Codex. OpenAI enterprise customers can now

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Replying to @philipkiely
Cool but open models dont work as well in codex. theres a pretty big difference using them in open harnesses usually

Oct 1, 2026 · 6:25 PM UTC
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