OpenAI GPT-5.6 Sol/Terra/Luna publicly released
Key Questions
What are the different tiers available in the GPT-5.6 release?
OpenAI released GPT-5.6 with three tiers: Sol as the flagship model, Terra as a mid-range option priced at half of GPT-5.5, and Luna as the lightweight version. The release followed a US security review and includes a global rollout of GPT-Live voice mode.
How does GPT-5.6 perform according to early user feedback?
Early reports highlight GPT-5.6 as a much better writer than Fable, with Sol positioned as a strong daily driver for knowledge work. Related coverage notes that the tiers gain a powerful edge over Anthropic models.
What updates are included in ChatGPT Work with GPT-5.6?
ChatGPT Work now integrates GPT-5.6 and Codex to support autonomous agent actions. Codex serves as the core of the new work product, enabling users to accomplish advanced tasks as noted in public updates.
OpenAI publicly releases GPT-5.6 after US security review. Three tiers: Sol (flagship), Terra (mid-range, half price of GPT-5.5), Luna (lightweight). GPT-Live voice mode also rolling globally. Early user reports highlight GPT-5.6 as a much better writer than Fable, and Sol as a strong daily driver for knowledge work. Pricing and capabilities now confirmed. New: ChatGPT Work uses GPT-5.6 and Codex for autonomous agent actions. (July 22)