Head-to-head comparison across 5benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5
91
Muse Spark
81
Verified leaderboard positions: GPT-5.5 #5 · Muse Spark unranked
Pick GPT-5.5 if you want the stronger benchmark profile. Muse Spark only becomes the better choice if multimodal & grounded is the priority.
Agentic
+22.5 difference
Coding
+3.1 difference
Reasoning
+42.5 difference
Knowledge
+16.0 difference
Multimodal
+11.8 difference
GPT-5.5
Muse Spark
$5 / $30
N/A
N/A
N/A
N/A
N/A
1M
262K
Pick GPT-5.5 if you want the stronger benchmark profile. Muse Spark only becomes the better choice if multimodal & grounded is the priority.
GPT-5.5 is clearly ahead on the provisional aggregate, 91 to 81. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5's sharpest advantage is in reasoning, where it averages 85 against 42.5. The single biggest benchmark swing on the page is ARC-AGI-2, 85% to 42.5%. Muse Spark does hit back in multimodal & grounded, so the answer changes if that is the part of the workload you care about most.
GPT-5.5 gives you the larger context window at 1M, compared with 262K for Muse Spark.
GPT-5.5 is ahead on BenchLM's provisional leaderboard, 91 to 81. The biggest single separator in this matchup is ARC-AGI-2, where the scores are 85% and 42.5%.
GPT-5.5 has the edge for knowledge tasks in this comparison, averaging 66.4 versus 50.4. Inside this category, AA-Omniscience Index is the benchmark that creates the most daylight between them.
Muse Spark has the edge for coding in this comparison, averaging 61.7 versus 58.6. Inside this category, Vibe Code Bench is the benchmark that creates the most daylight between them.
GPT-5.5 has the edge for reasoning in this comparison, averaging 85 versus 42.5. Inside this category, ARC-AGI-2 is the benchmark that creates the most daylight between them.
GPT-5.5 has the edge for agentic tasks in this comparison, averaging 81.5 versus 59. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
Muse Spark has the edge for multimodal and grounded tasks in this comparison, averaging 82.2 versus 70.4. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.