Key Info

OpenAI revealed that enterprise customers can now run open models such as GLM-5.3 Flash and Kimi K3 natively within Codex, with spend counted against their existing OpenAI commitment.

Highlights

  • Codex now natively supports third-party open models, not just OpenAI's own models
  • Named open models include GLM-5.3 Flash and Kimi K3
  • Enterprise usage of these open models counts toward the customer's OpenAI spend commitment
  • Part of OpenAI's broader push to embrace more open model options for enterprise users