The Model Index
Up to four models

Compare

Side by side on the same independent tests, with price and context. The link in your address bar shares this exact comparison.

Claude Opus 5.5Qwen3.8-Max
Next to Claude Opus 5.5
Presets
Claude Opus 5.5
199182–215
WeightsClosed
ReleasedSep 2026
Price in / out$4.0 / $20
Context1M
Core tests taken6 of 9
Qwen3.8-Max
170154–187
WeightsClosed
ReleasedAug 2026
Price in / out–
Context–
Core tests taken2 of 9

Claude Opus 5.5 leads Qwen3.8-Max by 29 points, ahead on 1 of 2 shared core tests.

Test by testindependent results

Claude Opus 5.5Qwen3.8-Max
0%25%50%75%100%REASONING & KNOWLEDGEGPQA Diamond (Epoch AI)GPQA Diamond (Epoch AI)SimpleQA VerifiedSimpleQA VerifiedMATHSFrontierMath (tiers 1-3)FrontierMath (tiers 1-3)AIME-style maths (OTIS mock)AIME-style maths (OTIS mock)FrontierMath (tier 4)FrontierMath (tier 4)CODINGFrontierSWEFrontierSWEAGENTSDTBenchDTBenchLMCALMCAMystery game puzzlesMystery game puzzles

Only tests that at least two of these models have taken. Bold rows are the core tests shown on every profile; all of these results inform the index score. Task length (METR) is listed below the chart because it is a duration, not a percentage.