Muse Spark 1.3
ECI#23
157Muse Spark 1.3 is a closed-weights model from Meta AI, released September 2, 2026. It has an ECI score of 157 and ranks 23rd of 253 tracked models. At the time of its release, it ranked 15th of 240 tracked models.
Muse Spark 1.3 vs select alternatives
| Domain | Benchmark | Muse Spark 1.3 | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 157 | 155 | 157 | 157 | |
| Ranking | #23 | #38 | #21 | #20 | |
| Games | Chess PuzzlesBest score 76% | ||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath Tiers 1-3 (v2)Best score 94% | ||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
OTIS Mock AIME 2024-2025Best score 100% | |||||
| Science | CritPt v1Best score 32% | ||||
SciCodeBest score 67% | |||||
| Software engineering | Text Arena (Coding)Best score 1820 | 1652 | 1534 | 1671 | 1568 |
WeirdML (v3)Best score 42% |
