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Claude Fable 5 (Part 1): What Changed, and How to Stop Prompting It Like Opus

By

Ken Huang

3d agoen

Source

kenhuangus.substack.comClaude Fable 5 (Part 1): What Changed, and How to Stop Prompting It Like Opuskenhuangus.substack.com
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I spent my first full day on Claude Fable 5 doing what I always do with a new frontier model: I threw my existing prompts at it, watched half of them underperform, and then rebuilt my setup from the API docs instead of from habit.

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