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GPT-6 Sol vs Opus 5.5: Price and Benchmarks

This story is from 2026-09-22. It is preserved in the archive; the latest stories are on the live feed.

The Short Version Sol and Luna are not new names: they arrived this summer as part of GPT-5.6. On 22 September 2026 OpenAI moved both to GPT-6 and halved the price, roughly 90 minutes after Anthropic shipped Claude Opus 5.5. Sol: $2 in / $10 out per million tokens. Opus 5.5 is $4 / $20, so Sol is e…

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  1. 2026-09-22 19:20 · DEV Community — AI
    GPT-6 Sol vs Opus 5.5: Price and Benchmarks

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