OpenAI's GPT-5.6 Sol nearly matches Claude Fable 5 at one-third the cost

OpenAI's GPT-5.6 Sol scores 59 on the Artificial Analysis Intelligence Index, just one point behind Anthropic's Claude Fable 5.

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The fact

Priced at $1.04 per task, it costs one-third of Anthropic's top model.

Sol outperforms all competitors in agentic coding, increasing pricing pressure on Anthropic.

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