GPT-6 Sol
by OpenAI · ID gpt-6-sol · Released 2026-09 · Proprietary
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ELO Score
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MMLU
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HumanEval
1.05M
Context Window
$2.00
Input Price
About GPT-6 Sol
Mid-tier of the GPT-6 family, released 22 September 2026 at half the price of GPT-5.6 Sol, and OpenAI states this is a permanent price rather than a promotion. Cached input $0.20 per million. 1.05M-token context, 128K output, knowledge cutoff 20 April 2026, reasoning effort from none to max with medium as default. On OpenAI's AutomationBench it completed 33.2% of agent tasks at $0.27 each, beating the far pricier GPT-6 Astra on both score and cost per task, and OpenAI says it makes about half as many factual mistakes as GPT-5.6 Sol. Not yet listed on the Arena text leaderboard as of 13 September 2026. Prices checked 23 September 2026.
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