Nathan Lambert: Kimi K3.1 Pro looks like the strongest open-weight model, with deliberate cyber pacing
natolambert · x · 2026-10-24
Nathan Lambert analyzes Kimi K3.1 Pro: if weights ship as claimed by Nov 4, its benchmarks clearly make it the strongest current open-weight model. He highlights Moonshot's explicit cyber-risk policy — not extending the absolute frontier of offensive cyber capability with open weights, pacing it behind the closed frontier while progressively raising open capabilities. Notes: K3.1 Pro is cheaper per token than K3 but uses meaningfully more tokens per answer, so real cost may be similar; the 'Pro' name hints a flash model is coming, mirroring DeepSeek and GLM.
Related event: Nathan Lambert Calls Kimi K3.1 Pro the Strongest Open-Weight Model(2 posts)→
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