Simon Willison on X: “The most important thing about Sonnet 5.5 is that it's now the model t…”

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Simon Willison

@simonw

The most important thing about Sonnet 5.5 is that it's now the model that powers the free tier on claude.ai - so all of this stuff can be done by free users

ChatGPT's free tier is still GPT-5.6 Luna, which is a lot less capable