Dev keeps thinking Fable 5.1 got nerfed — it silently downgraded to Opus 4.8 overnight
thomasahle · x · 2026-09-28
Developer thomasahle complains that he repeatedly felt Fable 5.1 had become "extremely dumb and nerfed" — only to realize the underlying model had been silently downgraded to Opus 4.8 overnight.
The quip highlights a broader pain point: silent model swaps behind coding tools change user experience without notice, making it easy to misjudge which model you're actually talking to.
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