Muse Spark 1.3
ECI#17
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 17th of 253 tracked models. At the time of its release, it ranked 14th of 249 tracked models.
Muse Spark 1.3 vs select alternatives
| Domain | Benchmark | Muse Spark 1.3 | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 157 | 155 | 157 | 157 | |
| Ranking | #17 | #30 | #15 | #19 | |
| Agent | APEX-AgentsBest score 84% | ||||
| Games | Chess PuzzlesBest score 72% | ||||
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 | CritPtBest score 32% | ||||
SciCodeBest score 67% | |||||
| Software engineering | Text Arena (Coding)Best score 1820 | 1652 | 1534 | 1568 | 1618 |
