Dev reports Opus 5.5 'got dumber today,' speculating a new model update is imminent
TejasKumar_ · x · 2026-10-05
Developer Tejas Kumar reports that Opus 5.5 visibly degraded in quality today, guessing a new model update is incoming. Such sudden behavior shifts are often read as signs of stealth rollouts or routing changes, though there's no official confirmation from Anthropic yet.
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