OpenAI Codex CLI v0.144.6 Changelog
What changed in Codex CLI v0.144.6, released 2026-07-18 — explained in plain English.
- Fixed the background instructions for three specific AI models (Sol, Terra, and Luna).
- Corrected their memory limits so they can process the right amount of text.
- This update makes sure the tool understands exactly how much text those models can handle at once.
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This release is a quick maintenance update for developers using the Codex command-line tool. It matters most to anyone relying on the newer GPT-5.6 models, ensuring the software gives them the correct instructions and accurately understands their memory limits.
Fixes
- Corrected model instructions and memory limits: The software comes with built-in instructions for three AI models named GPT-5.6 Sol, Terra, and Luna. Those instructions were outdated, so they got refreshed. It also fixed their "context windows"—which is the maximum amount of text the AI can read and remember at one time. It was incorrectly set, but is now accurately fixed at 272,000 tokens (which is roughly 200,000 words).
Breaking changes
No breaking changes in this release.
How to upgrade
Update to OpenAI Codex CLI v0.144.6 by running:
codex --upgradeThis is our plain-language summary. Read the complete, official notes on the OpenAI Codex CLI official changelog ↗.
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