Model Comparison
Opus 5.5 vs Ternary Bonsai 2 27b
Opus 5.5 ranks #2 on the AI IQ leaderboard with an estimated IQ of 141, while Ternary Bonsai 2 27b does not yet have a derived IQ. 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
| Opus 5.5Anthropic | Ternary Bonsai 2 27bUS (Other) | |
|---|---|---|
| Rank | #2 | — |
| IQ | 141 | — |
| Abstract Reasoning | 132 | 99 |
| Mathematical Reasoning | 149 | — |
| Academic Reasoning | 138 | 100 |
| Programmatic Reasoning | 154 | — |
| Computer Use | 148 | — |
| Reliability | 133 | — |
| Knowledge Work | 134 | — |
| Emotional Reasoning | — | — |
| Effective Cost / 1M Tokens | $35.73 | $0.41 |
| Sticker Price / 1M I/O Tokens | $24.00 | $0.57 |
| Speed | 98 tok/s | — |
| Context Window | 1M | 262K |
| Released | 2026-09-22 | 2026-09-17 |
| Open Weights | No | Yes |
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