Claim: Anthropic only ~4 points ahead internally, frontier labs holding back models
haider1 · x · 2026-11-10
An unverified insider-flavored claim making the rounds: Anthropic is supposedly only about 4 points ahead internally. The poster says Anthropic released Opus 5.5 while keeping Mythos 5.5 in-house, and OpenAI is holding back a model trained in August. On Epoch ECI, Astra 6.1 already matches Fable 5.5 — achieved purely via RL on a 5-month-old Astra pre-train. None of this is officially confirmed.
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