Rumor: Anthropic sitting on internal models that top every benchmark with 12x self-reported speedup
teortaxesTex · x · 2026-11-06
- An unverified leak claims Anthropic has cycled through 3+ internal flagship checkpoints since Mythos 5, with a Mythos 6 pretrain (heavier on RL) plausibly underway.
- Anthropic reportedly told METR that Model 2 is a new base model, and models derived from it should be far bigger jumps over Mythos 5.
- The attached chart shows Model 4 scoring above 50% on every benchmark METR threw at it, with staff self-reporting roughly a 12x task speedup.
- Takeaway: Anthropic is allegedly sitting on substantially stronger unreleased models. All rumors, unconfirmed.
Related event: Anthropic's Internal Models Reportedly Surpass Mythos 5(2 posts)→
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