Codex CLI 0.153.4 released

OpenAI released version 0.153.4 of its Codex command-line tool on September 4, according to the official changelog.

The update fixes the visibility of the Astra model in the bundled model picker, and makes Astra the default when no model configuration is present.

Command-line coding agents have become a standard part of many developers' workflows, and small changes to defaults matter: a model that becomes the fallback is the one whose behaviour users will see most often.

Teams that pin their tooling versions should note the change when upgrading, since the same configuration may now select a different model than before. The fix also restores a picker entry that had been hidden, giving users an explicit choice again.

As with any tool update, reviewing the changelog before upgrading helps avoid surprises in automated pipelines that invoke the tool without an explicit model setting, and teams can always set the model explicitly to keep behaviour stable across versions.