System card suggests Anthropic hides a stronger internal model, with Fable 5.2 not far behind
imjustnewatai · x · 2026-11-10
Citing Anthropic's Fable/Mythos 5.2 system card, Andrew Curran notes the company's most capable model remains internal, "hidden deep within their tower."
imjustnewatai adds that Anthropic is quite open about its internal model — Fable 5.2 isn't far behind it — and argues OpenAI should be similarly transparent about its own internal models.
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