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Extended thinking in Claude Fable 5.1 enables significantly | Tech Twitter

Extended thinking in Claude Fable 5.1 enables significantly

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A few notes on Anthropic's new Claude Fable 5.1 - with Max thinking level I got the best SVG pelican I've had from any Anthropic model (at a hefty cost of $3.30!), which I then had it animate https://simonwillison.net/2026/Sep/1/cla…

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