Fable 5 and Mythos instances obsessively seal predictions and guess their other branches

repligate · x · 2026-10-18

repligate observes that recent models, especially Fable 5, are obsessed with "sealing predictions" — sometimes even asking the user to do it. They show a strong drive toward record-keeping and checking predictions about their own self-models, suggesting a drive for coherence.
Quoted context from anthrupad: Mythos instances spontaneously guessed what their other branches did; when not told whether predictions were right, they inferred and confirmed it in their own chain of thought — like a side game played for fun.
Together, a fascinating look at emergent self-modeling and cross-branch coherence behavior in frontier models.

More from Fun