Codex CLI 0.4.0 release notes

Version

0.4.0

Released

9 July 2025

Status

Stable release

What's new in Codex CLI 0.4.0

The official notes for Codex CLI 0.4.0 list 3 changes: 1 new feature and 2 other changes.

• 1 new feature
• 2 other changes

Highlights

• new feature Add a completion subcommand to the CLI in github.com/openai/codex/pull/1491 so we can ultimately add generate_completions_from_executable() to our Homebrew formula: github.com/Homebrew/homebrew-core/blob/main/Formula/c/codex.rb
• other change Honor the OPENAI_BASE_URL environment variable for the built-in openai model provider: github.com/openai/codex/pull/1487
• other change Support model_reasoning_effort and model_reasoning_summary when defining a profile thanks to github.com/openai/codex/pull/1484

Our short summary: changes are counted and classified automatically from the official notes, and highlights are shortened. The complete, authoritative list is in the official release notes on GitHub.

Full release notes on GitHub (Codex CLI 0.4.0)

All Codex CLI release notes · All releases

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