Model Comparison
Kimi K2 vs Opus 5.5
Kimi K2 ranks #159 on the AI IQ leaderboard with an estimated IQ of 91, while Opus 5.5 ranks #2 on the AI IQ leaderboard with an estimated IQ of 141. The table below puts the two models side by side across the seven capability dimensions, emotional reasoning, cost, speed, and context window.
Where They Sit on the IQ Bell Curve
Both models highlighted on the standard normal IQ distribution of every tracked model
| Kimi K2Kimi | Opus 5.5Anthropic | |
|---|---|---|
| Rank | #159 | #2 |
| IQ | 91 | 141 |
| Abstract Reasoning | 72 | 132 |
| Mathematical Reasoning | 105 | 149 |
| Academic Reasoning | 103 | 138 |
| Programmatic Reasoning | 100 | 154 |
| Computer Use | 70 | 148 |
| Reliability | 99 | 133 |
| Knowledge Work | 90 | 134 |
| Emotional Reasoning | — | — |
| Effective Cost / 1M Tokens | $2.38 | $35.73 |
| Sticker Price / 1M I/O Tokens | $2.87 | $24.00 |
| Speed | 46 tok/s | 98 tok/s |
| Context Window | — | 1M |
| Released | 2025-07-11 | 2026-09-22 |
| Open Weights | Yes | No |
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