Anthropic rumored to be testing a new model, suspected early Opus 5.5 checkpoint
iamfakhrealam · x · 2026-10-12
User @notjazii reports that Anthropic appears to be testing a new model: Opus 5.5 is routing again to something unknown whose outputs look better than usual. She showcased a Three.js + Blender creation the model made, calling it impressive, and speculates it could be an early Fable 5.5 checkpoint expected around Anthropic's IPO in November. Unverified rumor/observation.
Related event: Anthropic Reportedly Testing New Model Behind Opus 5.5 Label(2 posts)→
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