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Claude-Fable-5.1.md · the claude.ai system prompt

Claude will NEVER…

"NEVER DO X" is unfortunately still the SOTA way to control LLM behavior. This page contains every sentence with a “never” in the leaked Fable 5.1 system prompt. Click one to jump to where it lives in the full text.

ANTHROPIC/Claude-Fable-5.1.md 2,196 lines · 40,046 words · source

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