OpenAI Codex CLI rust-v0.153.4

OpenAI Codex CLI rust-v0.153.4 was released on .

Summary

OpenAI Codex CLI rust-v0.153.4 now makes Astra easier to find and use as your default model. We've also fixed how guidance works so it only suggests advanced features when you actually have access to them. Check the full changelog to see what else improved.

Release Context

  • This was the 89th OpenAI Codex CLI release of 2026 tracked by Havoptic.
  • It shipped the same day as OpenAI Codex CLI rust-v0.153.3 (September 4, 2026).
  • OpenAI Codex CLI: ships every 1 days — 14 releases in the last month.

Why it matters: Astra Now Default Model in Bundled Picker.

Because we are beyond happy to have Astra rolled out today ahead of schedule and you have been super patient with us (not really, but it’s ok!)… we will do the full banked reset today too for all… — Tibo

Shipped around the same time

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

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Release Notes

Bug Fixes - Fixed Astra’s visibility in the bundled model picker and made it the bundled default when no model is explicitly configured. (42874) - Updated Astra’s guidance to use asynchronous questions only when the tool is available in the session. (42878) Changelog Full Changelog: https://github.com/openai/codex/compare/rust-v0.153.3...rust-v0.153.4 - 42874 [0.153 hotfix] Show Astra in bundled model picker @rhan-oai - 42878 [0.153 hotfix] Qualify Astra async-question guidance by tool availability @rhan-oai

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