METR chart shows Anthropic self-reported uplift hitting 12x with mystery 'Model 4'
maksym_andr · x · 2026-11-06
A METR chart of informal self-reported uplift from Anthropic employees shows Mythos 5 at 5x acceleration and a mystery "Model 4" at 12x, prompting questions about what Model 4 is — possibly an unreleased Anthropic model.
The chart, based on informal surveys and Slack polls (which METR itself flags as loose evidence), fits an exponential 3.9x/year trend with superexponential curvature, tracing generations from 3.7 Sonnet through Opus 4/4.5/4.6 and Mythos Preview up to the 12x data point.
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