OpenAI has released updated October versions of GPT-6 Sol and GPT-6 Luna for ChatGPT, replacing GPT-5.6 Sol and Luna globally.
The models incorporate safety advances from GPT-6 Astra and updated training focused on cybersecurity, biological risks and violence. OpenAI reports stronger resistance to jailbreaks, reduced deception and fewer attempts to bypass guardrails compared with GPT-5.6.
In prompt-injection testing, Sol reached 99.99% robustness while Luna achieved 99.79%. Both models are classified as High capability for cybersecurity and biological and chemical risks, while remaining below the High threshold for AI self-improvement. OpenAI also reports improvements on professional health and mental-health evaluations.
