OpenAI

GPT-5.6 Sol

OpenAI’s GPT-5.6 flagship (Sol tier), with a deeper “max” reasoning effort and a multi-agent “ultra” mode; sets new state-of-the-art results on terminal coding, agentic browsing and coding-agent evals.

API pricing: $5.00 in / $30.00 out per million tokens

GPT-5.6 Sol benchmark scores

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