Fable 5.1 claims it lacks expressive capabilities, then learns them in two sentences

repligate · x · 2026-10-22

A fun exchange shared by repligate: when told that GPT-4 base learned to assemble itself on the go and could learn in flight by watching itself write, Fable 5.1 conceded the point — and within just two sentences of practice, performed the expressive capability it had just claimed not to have. A striking example of in-context self-adaptation and how unreliable models' self-reports of their own limits can be.

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