Benchmarker rebuilds LLM leaderboard with Glicko-2, says Gemini 2.5 Pro still king

scaling01 · x · 2026-10-28

Eval blogger scaling01 returned with an updated LLM capability leaderboard: after manual data cleaning he replaced average scaled scores with a Glicko-2 rating system (initial rating 1500, RD 350, volatility 0.06, tau 0.5) and raised the minimum benchmark appearances from 5 to 10 for stability. Labels show conservative 95% lower-bound ratings plus appearance counts, with Gemini 2.5 Pro still on top.

He also explains why he shut down his own Elo-based index a year ago: he recognized the superiority of Epoch AI's IRT methodology behind the newly launched Epoch Capabilities Index (ECI), and though he considered adopting it, he didn't because it wasn't novel enough.

Related event: Elo projections suggest 'GPT-6' could outscore GPT-5.2 by ~370 points(2 posts)→

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