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Lab.

Working notes from the studio. The tools I build, the workflows I keep, the mistakes I paid for.

63 entries · latest 2026-09-02

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RAXXO Studios 9 min read

Claude Fable 5.1 and Mythos 5.1: What Changed on September 1

Anthropic shipped Fable 5.1 and Mythos 5.1 on September 1. Here is what actually changes for Claude Code users this week, not just the spec sheet.

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Claude Fable 5.1 and Mythos 5.1: What Changed on September 1

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