Codex CLI 0.3.0 release notes

Version

0.3.0

Released

8 July 2025

Status

Stable release

What's new in Codex CLI 0.3.0

The official notes for Codex CLI 0.3.0 list 3 changes: 1 new feature, 1 fix and 1 other change.

• 1 new feature
• 1 fix
• 1 other change

Highlights

• new feature Adds support for a --sandbox flag and makes some breaking changes to config.toml around this option. See github.com/openai/codex/pull/1476 for details.
• fix Fixes an issue where non-ASCII characters were crashing the CLI: github.com/openai/codex/issues/1450 (huge thanks to @ryozi-tn for the fix in github.com/openai/codex/pull/1467)
• other change Makes it possible to configure custom HTTP headers when making requests to model providers: github.com/openai/codex/pull/1473.

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 0.3.0)

All Codex CLI release notes · All releases

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