OpenAI Codex now natively runs open models like GLM-5.3 Flash and Kimi K3

HarveenChadha · x · 2026-09-30

Enterprise teams can now use open models such as GLM-5.3 Flash and Kimi K3 natively inside OpenAI's Codex, with spend counted against their OpenAI commit. Commenters call it an interesting direction, though how usage limits will work remains unclear.

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