Comments - Anthropic Just Shipped Fable 5 (Mythos) — Its Most Capable Model

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Christopher Johnson

Jun 10

The part I keep coming back to is what this means for orchestrated workflows. I run Claude Code setups for founders without engineering teams, and the jump in sustained coherence over long multi-step tasks means you can simplify the loop architecture significantly. With Sonnet we were spending design effort working around where the model would drift. Fable 5 holds the thread longer, which means systems get simpler to build and more accessible to teams that don't have engineers. That's the piece I'm most interested in stress-testing.