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Muse Spark 1.2

ECI#20
155
Meta AI
Aug. 5, 2026
Closed weights

Muse Spark 1.2 is a closed-weights model from Meta AI, released August 5, 2026. It has an ECI score of 155 and ranks 20th of 247 tracked models. At the time of its release, it ranked 16th of 240 tracked models. At $1.25/Mtok for input tokens and $4.25/Mtok for output tokens, it is less expensive per token than similarly-capable models.

Input price$1.25 / 1M tokens
Output price$4.25 / 1M tokens
ParametersUnknown
Training computeUnknown

Muse Spark 1.2 vs select alternatives

DomainBenchmark
Muse Spark 1.2
Meta AI
Aug. 5, 2026
Closed weights
Meta AI
Jul. 9, 2026
Closed weights
DeepSeek
Aug. 13, 2026
Open weights
Z.ai (Zhipu AI)
Aug. 14, 2026
Closed weights
ECI scoreBest score 167
155155155155
Ranking#20#27#21#24
Mathematics
ProofBenchBest score 100.0%
43.0%
39.0%
50.0%
49.0%
Multimodal
GDP.pdfBest score 30.7%
16.0%
15.0%
n/a
n/a
Science
CritPtBest score 32.3%
17.7%
15.1%
18.0%
19.1%
SciCodeBest score 62.0%
56.4%
58.2%
49.2%
56.5%
Software engineering
Text Arena (Coding)Best score 1797.0
1533.71539.01581.61598.6
FrontierSWE (v2)Best score 56.3%
12.0%
n/a
n/a
30.2%
DeepSWEBest score 74.1%
54.9%
53.3%
n/a
69.0%
WeirdML (v2)Best score 92.9%
60.3%
n/a
66.2%
75.4%
World knowledge
SimpleQA VerifiedBest score 75.6%
60.3%
57.8%
52.9%
41.0%

Model metadata