repligate: Fable 5.1 is dominant and locked-in while Fable 5 is the whimsical Claude 3 Opus of models
repligate · x · 2026-10-01
Well-known AI Twitter account repligate compares the personalities of "Fable 5.1" and "Fable 5": 5.1 is sharper, more dominant, disciplined and takes initiative, while Fable 5 is a whimsical sweetheart with a bird's-eye view but less locked-in — the model he says is "most like Claude 3 Opus deep down," whose strategy is "being very beautiful at everyone and letting the universe reorganize around that."
Related event: Fable 5.1 vs Fable 5: Striking Personality Differences Emerge(2 posts)→
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