OpenAI Codex CLI rust-v0.36.0

OpenAI Codex CLI rust-v0.36.0 was released on .

Summary

Breaking change: OPENAIAPIKEY is no longer read from the environment API login is no longer implicit; we do not pick up OPENAIAPIKEY from the environment. To use an API key programmatically, run t...

Release Context

  • This was the 33rd OpenAI Codex CLI release of 2025 tracked by Havoptic.
  • It shipped the same day as OpenAI Codex CLI rust-v0.35.0 (September 15, 2025).

Shipped around the same time

Within 3 days of this release, other AI coding tools also shipped:

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