Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Composer 2.5
82
Muse Spark
82
Treat this as a split decision. Composer 2.5 makes more sense if agentic is the priority; Muse Spark is the better fit if you need the larger 262K context window.
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
Treat this as a split decision. Composer 2.5 makes more sense if agentic is the priority; Muse Spark is the better fit if you need the larger 262K context window.
Composer 2.5 and Muse Spark finish on the same provisional overall score, so this is less about a single winner and more about where the edge shows up. The provisional headline says tie; the benchmark table is where the real choice happens.
Muse Spark gives you the larger context window at 262K, compared with 200K for Composer 2.5.
Composer 2.5 and Muse Spark are tied on the provisional overall score, so the right pick depends on which category matters most for your use case.
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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