Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4 mini
70
Muse Spark
82
Pick Muse Spark if you want the stronger benchmark profile. GPT-5.4 mini only becomes the better choice if knowledge is the priority or you need the larger 400K context window.
Agentic
+6.6 difference
Knowledge
+7.0 difference
Multimodal
+5.6 difference
GPT-5.4 mini
Muse Spark
$0.75 / $4.5
N/A
201 t/s
N/A
3.85s
N/A
400K
262K
Pick Muse Spark if you want the stronger benchmark profile. GPT-5.4 mini only becomes the better choice if knowledge is the priority or you need the larger 400K context window.
Muse Spark is clearly ahead on the provisional aggregate, 82 to 70. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Muse Spark's sharpest advantage is in multimodal & grounded, where it averages 82.2 against 76.6. The single biggest benchmark swing on the page is HLE, 41.5% to 50.4%. GPT-5.4 mini does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 mini gives you the larger context window at 400K, compared with 262K for Muse Spark.
Muse Spark is ahead on BenchLM's provisional leaderboard, 82 to 70. The biggest single separator in this matchup is HLE, where the scores are 41.5% and 50.4%.
GPT-5.4 mini has the edge for knowledge tasks in this comparison, averaging 57.4 versus 50.4. Inside this category, AA-Omniscience Index is the benchmark that creates the most daylight between them.
GPT-5.4 mini has the edge for agentic tasks in this comparison, averaging 65.6 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 76.6. Inside this category, AA-MMMU-Pro is the benchmark that creates the most daylight between them.
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