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 5.5MiMo-V2.6-Pro
Next to Claude Opus 5.5
Presets
Claude Opus 5.5
200188–211
WeightsClosed
ReleasedSep 2026
Price in / out$4.0 / $20
Context1M
Core tests taken4 of 8
MiMo-V2.6-Pro
~178estimated
WeightsOpen
ReleasedSep 2026
Price in / out$0.43 / $0.87
Context1.05M
Core tests taken–

Claude Opus 5.5 leads MiMo-V2.6-Pro by 22 points, at 15× the price (one score is an estimate).

Test by testindependent results · Epoch AI

Claude Opus 5.5MiMo-V2.6-Pro

These models share no independent tests yet.

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.