Muse Spark 1.2
ECI#38
155Muse Spark 1.2 is a closed-weights model from Meta AI, released August 5, 2026. It has an ECI score of 155 and ranks 38th of 253 tracked models. At the time of its release, it ranked 19th of 230 tracked models.
Muse Spark 1.2 vs select alternatives
| Domain | Benchmark | Muse Spark 1.2 | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 155 | 154 | 155 | 155 | |
| Ranking | #38 | #44 | #37 | #40 | |
| Agent | APEX-AgentsBest score 87% | ||||
| Conceptual reasoning | SimpleBenchBest score 82% | ||||
| Games | Chess PuzzlesBest score 76% | ||||
| Science | CritPt v1Best score 32% | ||||
SciCodeBest score 67% | |||||
| Software engineering | Text Arena (Coding)Best score 1820 | 1534 | 1542 | — | 1580 |
FrontierSWE (v2)Best score 66% | |||||
WeirdML (v2)Best score 94% | |||||
| World knowledge | SimpleQA VerifiedBest score 76% |
