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GPT-6.1 Sol went live in the API a few minutes before the keynote began. OpenAI's launch page says it matches GPT-6 Astra on its real-codebase coding benchmark at about a fifth of the cost, at $2 per million input tokens, $0.10 cached and $10 output.
OpenAI
GPT-6.1 Sol: near-Astra intelligence for a fifth of the price.
It’s the most cost-efficient model for its performance available today.
OpenAI's post on X, curated on eChai
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