# GPT-5.5 vs Muse Spark 1.1

> Side-by-side benchmark comparison for GPT-5.5 and Muse Spark 1.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-5-vs-muse-spark-1-1
- Last updated: October 7, 2026

- Shared sourced benchmarks: 15
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick GPT-5.5 if you want the stronger benchmark profile. Muse Spark 1.1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.5 leads overall 67.79 to 65.95.
- The clearest category separation is in reasoning, where the averages are 66.7 for GPT-5.5 and 75.7 for Muse Spark 1.1.
- The biggest single benchmark swing is CyberGym in Agentic, with scores of 81.8% and 59.0%.

## Model Snapshot

| Property | GPT-5.5 | Muse Spark 1.1 |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 67.79 | 65.95 |
| Benchmarks Covered | 41 | 26 |
| Pricing (input/output) | $5.00 / $30.00 | N/A |

## Category Breakdown

### Agentic

- Winner: GPT-5.5
- GPT-5.5 public-lane score: 60.6 (Supported · #22/122)
- Muse Spark 1.1 public-lane score: 56.9 (Supported · #32/122)

| Benchmark | GPT-5.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 82% | Coming soon | Coming soon |
| CyberGym | 81.8% | 59.0% | GPT-5.5 |
| BrowseComp | 84.4% | Coming soon | Coming soon |
| OSWorld-Verified | 78.7% | 80.8% | Muse Spark 1.1 |
| MCP Atlas | 75.3% | 88.1% | Muse Spark 1.1 |
| Toolathlon | 55.6% | 75.6% | Muse Spark 1.1 |
| τ²-bench results | 98% | Coming soon | Coming soon |
| Gert Labs | 72.93% | Coming soon | Coming soon |
| ResearchClawBench | 17.0% | Coming soon | Coming soon |
| OSWorld 2.0 | 13.0% | 14.2% | Muse Spark 1.1 |
| JobBench | 42.7% | 54.7% | Muse Spark 1.1 |
| ExploitGym | 13.4% | 0.8% | GPT-5.5 |
| Terminal-Bench 2.1 (Vals) | 76.4% | 69.3% | GPT-5.5 |
| ApprenticeBench | 20% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.0% | Coming soon |
| WebArena-Verified | Coming soon | 69% | Coming soon |
| DeepSearchQA | Coming soon | 84.9% | Coming soon |
| Finance Agent v2 | Coming soon | 57.2% | Coming soon |
| deepSwe | Coming soon | 53.3% | Coming soon |
| Cybench | Coming soon | 92.9% | Coming soon |

### Coding

- Winner: GPT-5.5
- GPT-5.5 public-lane score: 62.8 (Supported · #15/146)
- Muse Spark 1.1 public-lane score: 54.2 (Supported · #35/146)

| Benchmark | GPT-5.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 58.6% | 61.5% | Muse Spark 1.1 |
| Terminal-Bench 2.0 | 82.0% | Coming soon | Coming soon |
| Vibe Code Bench | 69.85% | Coming soon | Coming soon |
| React Native Evals | 84.7% | Coming soon | Coming soon |
| cursorBench31 | 59.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 58.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 43.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.3% | 85.9% | Muse Spark 1.1 |
| SWE-bench (Vals) | 82.6% | 82.0% | GPT-5.5 |
| PostTrainBench v1.1 | 27.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.5 public-lane score: 66.7 (#18/28)
- Muse Spark 1.1 public-lane score: 75.7 (Unranked · 3 rankable rows)

| Benchmark | GPT-5.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 64K-128K | 83.1% | Coming soon | Coming soon |
| MRCR v2 128K-256K | 87.5% | Coming soon | Coming soon |
| ARC-AGI-2 | 85% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |
| ARC-AGI-1 | 95.00% | Coming soon | Coming soon |
| MRCR 1M | Coming soon | 54.1% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.5 public-lane score: 71.4 (#19/49)
- Muse Spark 1.1 public-lane score: 78.3 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 81.2% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 83.2% | Coming soon | Coming soon |
| OfficeQA Pro | 54.1% | Coming soon | Coming soon |
| CharXiv | Coming soon | 88.4% | Coming soon |
| BabyVision | Coming soon | 76.3% | Coming soon |

### Knowledge

- Winner: GPT-5.5
- GPT-5.5 public-lane score: 69.3 (Supported · #14/174)
- Muse Spark 1.1 public-lane score: 66.7 (Supported · #21/174)

| Benchmark | GPT-5.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | Coming soon | Coming soon |
| GPQA-D | 93.6% | Coming soon | Coming soon |
| HLE | 52.2% | 62.1% | Muse Spark 1.1 |
| HLE w/o tools | 41.4% | 52.2% | Muse Spark 1.1 |
| GPQA Diamond (Vals) | 93.2% | 91.2% | GPT-5.5 |
| MMLU-Pro (Vals) | 88.1% | 88.7% | Muse Spark 1.1 |
| HealthBench Professional | Coming soon | 59.3% | Coming soon |

### Instruction Following

- Winner: Not comparable
- GPT-5.5 public-lane score: 91.9 (#7/125)
- Muse Spark 1.1 public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- GPT-5.5 public-lane score: 69.4 (Unranked · 3 rankable rows)
- Muse Spark 1.1 public-lane score: Coming soon

| Benchmark | GPT-5.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 51.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 51.700% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 35.400% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.5 or Muse Spark 1.1?

GPT-5.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.5 and Muse Spark 1.1?

The widest category gap is in reasoning, where the averages are 66.7 for GPT-5.5 and 75.7 for Muse Spark 1.1.

### How many benchmarks does GPT-5.5 cover on BenchLM?

GPT-5.5 currently has 41 sourced benchmark scores on BenchLM.

### How many benchmarks does Muse Spark 1.1 cover on BenchLM?

Muse Spark 1.1 currently has 26 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.5 vs GPT-5.5 Pro](/compare/gpt-5-5-vs-gpt-5-5-pro)
- [Muse Spark 1.1 vs GPT-5.5 Pro](/compare/gpt-5-5-pro-vs-muse-spark-1-1)
- [GPT-5.5 vs Muse Spark 1.2](/compare/gpt-5-5-vs-muse-spark-1-2)
- [Muse Spark 1.1 vs Muse Spark 1.2](/compare/muse-spark-1-1-vs-muse-spark-1-2)

## Explore More

- [GPT-5.5 profile](/models/gpt-5-5)
- [Muse Spark 1.1 profile](/models/muse-spark-1-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)