Quality: the BenchLeader Index
Composite of every quality benchmark, normalised per benchmark and averaged per category. Requires results on at least five benchmarks across two categories. The full LLM leaderboard adds speed, price and every configuration.
As of 21 Oct 2026, BenchLeader ranks Claude Opus 5.5 first on the Quality: the BenchLeader Index board at 72.7, ahead of Gemini 4 Argon (71.0) and Muse Wonder Full (70.7).
775 models · data as of 21 Oct 2026
- 1Claude Opus 5.5 (max)72.7
- 2Gemini 4 Argon (high)71.0
- 3Muse Wonder Full (max)70.7
- 4GPT-6 Astra (max)70.6
- 5Claude Fable 5.1 (max)70.6
- 6GPT-6.1 Sol (max)70.0
- 7Claude Sonnet 5.5 (max)69.5
- 8Claude Fable 5 (max)69.4
- 9Claude Opus 5 (max)68.9
- 10GPT-5.6 Sol (max)68.0
- 11Muse Wonder (max)67.5
- 12Muse Spark 1.3 (max)67.2
- 13GPT-6 Sol (max)66.6
- 14GPT-5.5 (xhigh)66.1
- 15GPT-5.5 Pro (xhigh)65.3
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Cite as: BenchLeader, “Quality: the BenchLeader Index”, https://www.benchleader.com/leaderboards/quality, data as of 21 Oct 2026.