Model Comparison
Fable 5.1 vs Xing4.0 29b A4b
Fable 5.1 ranks #4 on the AI IQ leaderboard with an estimated IQ of 138, while Xing4.0 29b A4b 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
| Fable 5.1Anthropic | Xing4.0 29b A4bChina (Other) | |
|---|---|---|
| Rank | #4 | — |
| IQ | 138 | — |
| Abstract Reasoning | 124 | 99 |
| Mathematical Reasoning | 149 | — |
| Academic Reasoning | 137 | 100 |
| Programmatic Reasoning | 147 | — |
| Computer Use | 142 | — |
| Reliability | 136 | — |
| Knowledge Work | 133 | — |
| Emotional Reasoning | — | — |
| Effective Cost / 1M Tokens | $89.32 | — |
| Sticker Price / 1M I/O Tokens | $60.00 | — |
| Speed | 61 tok/s | — |
| Context Window | 1M | 262K |
| Released | 2026-09-01 | 2026-09-17 |
| Open Weights | No | Yes |
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