Codex now natively runs open models like GLM-5.3 Flash and Kimi K3, billed to OpenAI commits
thsottiaux · x · 2026-09-30
- Codex now natively supports third-party open models, with enterprise teams able to run GLM-5.3 Flash and Kimi K3 directly inside the coding agent.
- Spend on these open models counts against teams' existing OpenAI commit, removing the need for separate billing relationships.
- A Codex team member amplified the move with "Open is the way," signaling OpenAI is folding open-weight models into its own tooling ecosystem.
Related event: OpenAI Codex Natively Supports Open-Source Models Like GLM and Kimi(2 posts)→
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