Anthropic's next model reportedly finished training; METR eval shows biggest step-change
daniel_mac8 · x · 2026-11-06
- Unconfirmed report: Anthropic's next model (Model 4, possibly Claude 6) finished training last month, per METR private evals, with release guessed for early next year.
- The accompanying METR chart shows frontier benchmark growth accelerating from +17/yr to +24/yr (1.4x) after October 2025.
- Accounting for training time between iterations, the author calls it the largest step-change on the chart and attributes it to RSI-style self-improvement effects.
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