# Claude Opus 4.5 vs Muse Spark 1.1

> Side-by-side benchmark comparison for Claude Opus 4.5 and Muse Spark 1.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-5-vs-muse-spark-1-1
- Last updated: October 7, 2026

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

## Quick Verdict

Pick Muse Spark 1.1 if you want the stronger benchmark profile. Claude Opus 4.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Muse Spark 1.1 leads overall 65.95 to 54.12.
- The clearest category separation is in multimodal & grounded, where the averages are 24.5 for Claude Opus 4.5 and 78.3 for Muse Spark 1.1.
- The biggest single benchmark swing is MCP Atlas in Agentic, with scores of 42.3% and 88.1%.
- Muse Spark 1.1 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.5 | Muse Spark 1.1 |
|----------|----------|----------|
| Creator | Anthropic | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1M |
| Overall Score | 54.12 | 65.95 |
| Benchmarks Covered | 45 | 26 |
| Pricing (input/output) | $5.00 / $25.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 31 (Estimated · #84/122)
- Muse Spark 1.1 public-lane score: 56.9 (Supported · #32/122)

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | Coming soon | Coming soon |
| OSWorld-Verified | 66.3% | 80.8% | Muse Spark 1.1 |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | Coming soon | Coming soon |
| QwenClawBench | 52.3% | Coming soon | Coming soon |
| τ³-bench results | 70.2% | Coming soon | Coming soon |
| VITA-Bench | 23.3% | Coming soon | Coming soon |
| DeepPlanning | 26.4% | Coming soon | Coming soon |
| Toolathlon | 43.5% | 75.6% | Muse Spark 1.1 |
| MCP Atlas | 42.3% | 88.1% | Muse Spark 1.1 |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | 59.0% | Muse Spark 1.1 |
| Gert Labs | 64.23% | Coming soon | Coming soon |
| JobBench | 32.3% | 54.7% | Muse Spark 1.1 |
| 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 |
| OSWorld 2.0 | Coming soon | 14.2% | Coming soon |
| Cybench | Coming soon | 92.9% | Coming soon |
| ExploitGym | Coming soon | 0.8% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 69.3% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 41.8 (Estimated · #62/146)
- Muse Spark 1.1 public-lane score: 54.2 (Supported · #35/146)

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | Coming soon | Coming soon |
| LiveCodeBench v6 | 84.8% | Coming soon | Coming soon |
| SWE-bench Pro | 57.1% | 61.5% | Muse Spark 1.1 |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.9% | Coming soon |
| SWE-bench (Vals) | Coming soon | 82.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 73.3 (Unranked · 4 rankable rows)
- Muse Spark 1.1 public-lane score: 75.7 (Unranked · 3 rankable rows)

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |
| MRCR 1M | Coming soon | 54.1% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 24.5 (#47/49)
- Muse Spark 1.1 public-lane score: 78.3 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 70.6% | Coming soon | Coming soon |
| MathVision | 74.3% | Coming soon | Coming soon |
| CharXiv | 68.5% | 88.4% | Muse Spark 1.1 |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | Coming soon | Coming soon |
| V* | 67.0% | Coming soon | Coming soon |
| BabyVision | Coming soon | 76.3% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 49.3 (Estimated · #70/174)
- Muse Spark 1.1 public-lane score: 66.7 (Supported · #21/174)

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87% | Coming soon | Coming soon |
| SuperGPQA | 70.6% | Coming soon | Coming soon |
| MMLU-Pro | 89.5% | Coming soon | Coming soon |
| MMLU-Redux | 96.6% | Coming soon | Coming soon |
| C-Eval | 92.2% | Coming soon | Coming soon |
| HLE | 30.8% | 62.1% | Muse Spark 1.1 |
| HLE w/o tools | Coming soon | 52.2% | Coming soon |
| HealthBench Professional | Coming soon | 59.3% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 91.2% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.7% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 96.5 (#2/16)
- Muse Spark 1.1 public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 85.7% | Coming soon | Coming soon |
| NOVA-63 | 56.7% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 30.6 (#115/125)
- Muse Spark 1.1 public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 90.9% | Coming soon | Coming soon |
| IFBench | 58% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 57.9 (#6/7)
- Muse Spark 1.1 public-lane score: Coming soon

| Benchmark | Claude Opus 4.5 | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.1% | Coming soon | Coming soon |
| HMMT Feb 2025 | 92.9% | Coming soon | Coming soon |
| HMMT Nov 2025 | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2026 | 85.3% | Coming soon | Coming soon |
| MMAnswerBench | 84.0% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 20.690% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.167% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.5 or Muse Spark 1.1?

Muse Spark 1.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.5 and Muse Spark 1.1?

The widest category gap is in multimodal & grounded, where the averages are 24.5 for Claude Opus 4.5 and 78.3 for Muse Spark 1.1.

### How many benchmarks does Claude Opus 4.5 cover on BenchLM?

Claude Opus 4.5 currently has 45 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

- [Claude Opus 4.5 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-vs-claude-opus-4-5-thinking)
- [Muse Spark 1.1 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-muse-spark-1-1)
- [Claude Opus 4.5 vs Muse Spark 1.2](/compare/claude-opus-4-5-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

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [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)