Model Comparison
Fable 5.1 vs Muse Spark 1.3
Fable 5.1 ranks #4 on the AI IQ leaderboard with an estimated IQ of 138, while Muse Spark 1.3 ranks #18 on the AI IQ leaderboard with an estimated IQ of 128. 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 | Muse Spark 1.3Meta | |
|---|---|---|
| Rank | #4 | #18 |
| IQ | 138 | 128 |
| Abstract Reasoning | 124 | 103 |
| Mathematical Reasoning | 148 | 134 |
| Academic Reasoning | 136 | 133 |
| Programmatic Reasoning | 147 | 138 |
| Computer Use | 140 | 130 |
| Reliability | 135 | 127 |
| Knowledge Work | 133 | 130 |
| Emotional Reasoning | — | — |
| Effective Cost / 1M Tokens | $89.21 | $8.25 |
| Sticker Price / 1M I/O Tokens | $60.00 | $5.50 |
| Speed | 68 tok/s | 124 tok/s |
| Context Window | 1M | 1M |
| Released | 2026-09-01 | 2026-09-02 |
| Open Weights | No | No |
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