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.
After 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 …
