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simonwillison.net/2026/Jun/11/... This is a great example of what I'm talking about. AI enthusiasts would likely get lost in everything the agent is doing; "look how productive it is! It's inventing whole debugging flows!" But step back, and you see it burned $12 in tokens on a 2-line CSS fix.

simonwillison.netClaude Fable is relentlessly proactiveAfter two days of experience with Claude Fable 5 I think the best way to describe it is relentlessly proactive. It knows a whole lot of tricks and it will …

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