GPT-5.5 Pro vs Muse Spark 1.1
Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
Muse Spark 1.1 leads for most workloads by a narrow margin.
Based on BenchLM composite scores, July 2026.
GPT-5.5 Pro
77
Muse Spark 1.1
78
Pick Muse Spark 1.1 if you want the stronger benchmark profile. GPT-5.5 Pro only becomes the better choice if agentic is the priority.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | GPT-5.5 Pro | Δ | Muse Spark 1.1 |
|---|---|---|---|
| Agentic | 90.1 | ← 9.7 | 80.4 |
| Knowledge | 57.2 | → 4.9 | 62.1 |
| Coding | — | — | 61.5 |
| Math | 52.4 | — | — |
| Multimodal | — | — | 88.4 |
Operational Comparison
GPT-5.5 Pro
Muse Spark 1.1
$30 / $180
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1M
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Quick Verdict
Pick Muse Spark 1.1 if you want the stronger benchmark profile. GPT-5.5 Pro only becomes the better choice if agentic is the priority.
Muse Spark 1.1 finishes one point ahead on BenchLM's provisional leaderboard, 78 to 77. That is enough to call, but not enough to treat as a blowout. This matchup comes down to a few meaningful edges rather than one model dominating the board.
Muse Spark 1.1's sharpest advantage is in knowledge, where it averages 62.1 against 57.2. The single biggest benchmark swing on the page is HLE, 57.2% to 62.1%. GPT-5.5 Pro does hit back in agentic, so the answer changes if that is the part of the workload you care about most.
Benchmark Deep Dive
Frequently Asked Questions (3)
Which is better, GPT-5.5 Pro or Muse Spark 1.1?
Muse Spark 1.1 is ahead on BenchLM's provisional leaderboard, 78 to 77. The biggest single separator in this matchup is HLE, where the scores are 57.2% and 62.1%.
Which is better for knowledge tasks, GPT-5.5 Pro or Muse Spark 1.1?
Muse Spark 1.1 has the edge for knowledge tasks in this comparison, averaging 62.1 versus 57.2. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, GPT-5.5 Pro or Muse Spark 1.1?
GPT-5.5 Pro has the edge for agentic tasks in this comparison, averaging 90.1 versus 80.4. Muse Spark 1.1 stays close enough that the answer can still flip depending on your workload.
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