The October GPT-6 System Card Keeps Codex on the September Models
The 7 October card says ChatGPT moves to the October GPT-6 Sol and Luna, while Codex and ChatGPT Work stay on the September versions.
Direct answer
The Deployment Safety Hub page published 7 October 2026 says GPT-6 Sol and GPT-6 Luna replace GPT-5.6 Sol and GPT-5.6 Luna in ChatGPT, and that Codex and ChatGPT Work still use the September versions. It treats the October models as High capability in cybersecurity and in biological and chemical domains, and says neither reaches the High threshold in AI self-improvement.
The OpenAI Deployment Safety Hub page titled GPT-6 Sol and GPT-6 Luna: October 2026 update is marked published 7 October 2026. The introduction says GPT-6 is launching to everyone in ChatGPT, on free and paid plans, globally, and that these models replace GPT-5.6 Sol and GPT-5.6 Luna in ChatGPT. It then splits the name by month. October means the versions released that day. September means the versions that remain in Codex and in ChatGPT Work. Users of GPT-6 Sol and GPT-6 Luna in Codex, and via ChatGPT Work, are still on those previously released versions.
Under the Preparedness Framework, the page says this October release of GPT-6 Sol and GPT-6 Luna is treated as High capability in both cybersecurity and biological and chemical domains. It says neither reaches the High threshold in AI self-improvement. It says the safeguards for those October models are the same set described in the GPT-5.6 system card for GPT-5.6 Sol and GPT-5.6 Luna. Safety evaluations are measured at the lowest reasoning deployment settings. Capability assessments use maximum reasoning effort. The page does not print a parameter count or a price.
What the introduction does not score
The introduction says GPT-6 in ChatGPT incorporates Astra's safety advances and that safety training was updated. It does not attach a percentage to jailbreak resistance. Later sections discuss evaluation design. The product split that the introduction does state is ChatGPT on the October models, and Codex plus ChatGPT Work still on the September models.
FAQ
- Which products stay on the September versions?
- The introduction says users of GPT-6 Sol and GPT-6 Luna in Codex, and via ChatGPT Work, are still on previously released versions, which the card calls September.
- Does the card say the October models reach High in self-improvement?
- It says neither reaches the High threshold in AI self-improvement.