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simon_willison ยท Sep 22, 2026 ยท news

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Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war

simonwillison.netSep 22, 2026
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Yesterday was Grok 4.7 ( pelicans ) and MiMo v2.6 Flash/Pro ( more pelicans ). Today Anthropic released Claude Opus 5.5 , and around an hour later OpenAI released GPT-6 Sol and GPT-6 Luna . It's going to take a while...

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