Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5 Pro
100
Muse Spark
83
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Muse Spark only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Agentic
+31.1 difference
Knowledge
+6.8 difference
GPT-5.5 Pro
Muse Spark
$30 / $180
N/A
N/A
N/A
N/A
N/A
1M
262K
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Muse Spark only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
GPT-5.5 Pro is clearly ahead on the provisional aggregate, 100 to 83. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro's sharpest advantage is in agentic, where it averages 90.1 against 59. The single biggest benchmark swing on the page is HLE, 57.2% to 50.4%.
GPT-5.5 Pro gives you the larger context window at 1M, compared with 262K for Muse Spark.
GPT-5.5 Pro is ahead on BenchLM's provisional leaderboard, 100 to 83. The biggest single separator in this matchup is HLE, where the scores are 57.2% and 50.4%.
GPT-5.5 Pro has the edge for knowledge tasks in this comparison, averaging 57.2 versus 50.4. Inside this category, HLE is the benchmark that creates the most daylight between them.
GPT-5.5 Pro has the edge for agentic tasks in this comparison, averaging 90.1 versus 59. Muse Spark stays close enough that the answer can still flip depending on your workload.
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