OpenAI launches GPT-5.6 Sol, Terra and Luna
OpenAI launches GPT-5.6 Sol, Terra and Luna, with rollout beginning across ChatGPT, ChatGPT Work, Codex and the API on July 9, 2026.
What happened
Event details
The GPT-5.6 family includes flagship model Sol, balanced model Terra and low-cost model Luna. OpenAI highlights improvements in agentic coding, professional knowledge work, computer use, scientific research and cybersecurity, alongside maximum reasoning effort, multi-agent capabilities, programmatic tool calling and clearer prompt-caching behavior. The family entered limited preview on June 26, 2026, and moved to general availability on July 9.
Assessment
Why it matters
The release brings OpenAI's next flagship model family, multi-agent collaboration, programmatic tool calling, stronger computer use and tiered reasoning into mainstream products and the public API, with broad technical, ecosystem and competitive effects.
Availability
Access notes
Global rollout began July 9, 2026, across ChatGPT, ChatGPT Work, Codex and the OpenAI API, with full availability expected within 24 hours. Models, reasoning effort and multi-agent modes vary by product and subscription.