Model comparison
GPT-5.4 Pro vs Muse Spark 1.1
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.4 Pro #44 (Estimated); Muse Spark 1.1 #6 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.4 Pro and Muse Spark 1.1 share 3 comparable benchmark results. 3 of 8 categories are comparable. 9 results are unique to GPT-5.4 Pro; 36 to Muse Spark 1.1.
Updated July 23, 2026- Shared results
- 3
- GPT-5.4 Pro only
- 9
- Muse Spark 1.1 only
- 36
- Comparable categories
- 3 / 8
Pick Muse Spark 1.1 if you want the stronger benchmark profile. GPT-5.4 Pro only becomes the better choice if agentic is the priority or you need the larger 1.05M context window.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Muse Spark 1.1 is clearly ahead on the BenchAlign aggregate, 77.44 to 60.89. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Muse Spark 1.1's sharpest advantage is in knowledge, where it averages 62.1 against 58.7. The single biggest benchmark swing on the page is HLE, 58.7% to 62.1%. GPT-5.4 Pro does hit back in agentic, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 1M for Muse Spark 1.1.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.4 Pro | Δ | Muse Spark 1.1 |
|---|---|---|---|
| Agentic | GPT-5.4 Pro89.3 | Margin← 8.9 | Muse Spark 1.180.4 |
| Multimodal | GPT-5.4 Pro94.0 | Margin← 5.6 | Muse Spark 1.188.4 |
| Knowledge | GPT-5.4 Pro58.7 | Margin→ 3.4 | Muse Spark 1.162.1 |
| Coding | GPT-5.4 ProNot measured | MarginNo overlap | Muse Spark 1.161.5 |
| Reasoning | GPT-5.4 Pro83.3 | MarginNo overlap | Muse Spark 1.1Not measured |
| Math | GPT-5.4 Pro46.9 | MarginNo overlap | Muse Spark 1.1Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
HLE
KnowledgeA 58.7%B 62.1%Winner: Muse Spark 1.1Δ 3.4HLE: GPT-5.4 Pro scored 58.7%; Muse Spark 1.1 scored 62.1%. Muse Spark 1.1 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.4 Pro | Muse Spark 1.1 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.4 Pro$30 input / $180 output | Muse Spark 1.1Not available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-5.4 Pro74 tok/s | Muse Spark 1.1Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.4 Pro151.79 s | Muse Spark 1.1Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.4 Pro1.05M | Muse Spark 1.11M | GPT-5.4 Pro lists the larger context window. |
Benchmark Deep Dive
AgenticGPT-5.4 Pro wins21 benchmarks
| Benchmark | GPT-5.4 Pro | Muse Spark 1.1 | Result |
|---|---|---|---|
| BrowseCompSource | 89.3% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 80% | Not comparable |
| MCP AtlasSource | — | 88.1% | Not comparable |
| ToolathlonSource | — | 75.6% | Not comparable |
| OSWorld-VerifiedSource | — | 80.8% | Not comparable |
| DeepSearchQASource | — | 84.9% | Not comparable |
| CyberGymSource | — | 59.0% | Not comparable |
| Finance Agent v2Source | — | 57.2% | Not comparable |
| deepSweSource | — | 53.3% | Not comparable |
| OSWorld 2.0Source | — | 14.2% | Not comparable |
| JobBenchSource | — | 54.7% | Not comparable |
| CybenchSource | — | 92.9% | Not comparable |
| ExploitGymSource | — | 0.8% | Not comparable |
| AA Agentic IndexSource | — | 37.5% | Not comparable |
| GDPval-AASource | — | 43.7% | Not comparable |
| GDPval-AASource | — | 1374 | Not comparable |
| AA BriefcaseSource | — | 863 | Not comparable |
| AA AutomationBenchSource | — | 42.8% | Not comparable |
| AA Harvey LABSource | — | 93.1% | Not comparable |
| AA Tau3 BankingSource | — | 25.2% | Not comparable |
| aaTerminalBench21Source | — | 77.9% | Not comparable |
Coding4 benchmarks
Reasoning4 benchmarks
KnowledgeMuse Spark 1.1 wins11 benchmarks
| Benchmark | GPT-5.4 Pro | Muse Spark 1.1 | Result |
|---|---|---|---|
| HLESource | 58.7% | 62.1% | Muse Spark 1.1 leads |
| FrontierScienceSource | 36.7% | — | Not comparable |
| FrontierScience ResearchSource | 36.7% | — | Not comparable |
| HLE w/o toolsSource | 42.7% | 52.2% | Muse Spark 1.1 leads |
| HealthBench ProfessionalSource | — | 59.3% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 50.6% | Not comparable |
| AA-GPQA DiamondSource | — | 89.8% | Not comparable |
| AA-HLESource | — | 45.1% | Not comparable |
| AA-Omniscience IndexSource | — | 18.0% | Not comparable |
| AA-Omniscience AccuracySource | — | 40.6% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 38.1% | Not comparable |
Math4 benchmarks
Frequently Asked Questions (4)
Which is better, GPT-5.4 Pro or Muse Spark 1.1?
Muse Spark 1.1 is ahead on BenchLM's BenchAlign leaderboard, 77.44 to 60.89. The biggest single separator in this matchup is HLE, where the scores are 58.7% and 62.1%.
Which is better for knowledge tasks, GPT-5.4 Pro or Muse Spark 1.1?
Muse Spark 1.1 has the edge for knowledge tasks in this comparison, averaging 62.1 versus 58.7. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, GPT-5.4 Pro or Muse Spark 1.1?
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 89.3 versus 80.4. Muse Spark 1.1 stays close enough that the answer can still flip depending on your workload.
Which is better for multimodal and grounded tasks, GPT-5.4 Pro or Muse Spark 1.1?
GPT-5.4 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 94 versus 88.4. Muse Spark 1.1 stays close enough that the answer can still flip depending on your workload.
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