Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Composer 2.5
64
Muse Spark
77
Pick Muse Spark if you want the stronger benchmark profile. Composer 2.5 only becomes the better choice if agentic is the priority.
Agentic
+10.3 difference
Composer 2.5
Muse Spark
$0.5 / $2.5
N/A
N/A
N/A
N/A
N/A
200K
262K
Pick Muse Spark if you want the stronger benchmark profile. Composer 2.5 only becomes the better choice if agentic is the priority.
Muse Spark is clearly ahead on the provisional aggregate, 77 to 64. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Muse Spark gives you the larger context window at 262K, compared with 200K for Composer 2.5.
Muse Spark is ahead on BenchLM's provisional leaderboard, 77 to 64. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 69.3% and 59%.
Composer 2.5 has the edge for agentic tasks in this comparison, averaging 69.3 versus 59. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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