InferenceBench trend: frontier models' inference speedups grew from 3x to 12x in a year

maksym_andr · x · 2026-11-09

InferenceBench's historical trend from Sep 2025 to Oct 2026 shows frontier models' inference-optimization speedup factors growing from 3x to 12x, with a doubling time of 6.3 months (×1.117/month, R²=0.95). The leaderboard has Claude Opus 5.5 (Max) at 12.08x geometric-mean speedup, followed by Claude Fable 5.1 (9.83x) and Claude Opus 5 (8.90x); GPT-6 Astra (Ultra) hits 7.90x and GLM-5.2 (Max) 7.00x — all far above default vLLM/SGLang configs.

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