Sol, Terra, and Luna, our GPT‑5.6 family of models, are starting to...
OpenAI@OpenAI
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Jul 10, 2026
~2 min read
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Sol, Terra, and Luna, our GPT‑5.6 family of models, are starting to roll out now in ChatGPT, Codex, and the API.
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GPT-5.6 Sol sets a new standard for intelligence and efficiency, delivering state-of-the-art performance across coding, knowledge work, cybersecurity, and science with fewer tokens and lower cost.
openai.com/index/gpt-5-6/
openai.com/index/gpt-5-6/
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On Agents' Last Exam, GPT‑5.6 Sol sets a new high of 53.6, eclipsing Claude Fable 5 (adaptive) by 13.1 points.
At medium reasoning, it beats Fable 5 by 11.4 points at roughly one-quarter the estimated cost. GPT‑5.6 Terra and Luna also outperforms Fable 5 at around one-sixteenth the cost.
At medium reasoning, it beats Fable 5 by 11.4 points at roughly one-quarter the estimated cost. GPT‑5.6 Terra and Luna also outperforms Fable 5 at around one-sixteenth the cost.
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On the Artificial Analysis Coding Agent Index, GPT‑5.6 Sol sets a new state of the art at 80.0—2.8 points above Claude Fable 5—while using less than half the output tokens, taking less than half the time, and costing about one-third less.
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GPT-5.6 launches with ultra mode, our highest-performance setting to accelerate your most ambitious work by coordinating multiple agents to work in parallel.
It trades higher token use for stronger and faster results on demanding tasks.
It trades higher token use for stronger and faster results on demanding tasks.
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GPT‑5.6 delivers a step change in design judgment.
Its stronger computer-use capabilities let it inspect and refine the rendered result—not just generate the underlying code or content—so it can catch visual and functional issues and apply finishing touches before handing the work back.
Its stronger computer-use capabilities let it inspect and refine the rendered result—not just generate the underlying code or content—so it can catch visual and functional issues and apply finishing touches before handing the work back.
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GPT‑5.6 improves artifact quality across presentations, documents, and spreadsheets, and works better with your templates.
These editable artifacts can be exported to the tools professionals already use and refined as part of real enterprise workflows.
These editable artifacts can be exported to the tools professionals already use and refined as part of real enterprise workflows.
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GPT‑5.6 is available starting today across ChatGPT, Codex, and the OpenAI API. The rollout is starting globally now and will continue gradually toward full availability over the next 24 hours.
In ChatGPT, Plus, Pro, Business, and Enterprise users access GPT-5.6 Sol through medium and higher effort settings.
Pro and Enterprise users can also select GPT‑5.6 Pro for the highest-quality results on complex tasks.
In ChatGPT, Plus, Pro, Business, and Enterprise users access GPT-5.6 Sol through medium and higher effort settings.
Pro and Enterprise users can also select GPT‑5.6 Pro for the highest-quality results on complex tasks.
