# Claude Opus 4.5 vs Muse Spark

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

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

- Shared sourced benchmarks: 11
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Muse Spark 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 leads overall 59.99 to 54.06.
- The clearest category separation is in instruction following, where the averages are 30.6 for Claude Opus 4.5 and 91.9 for Muse Spark.
- The biggest single benchmark swing is ScreenSpot Pro in Multimodal & Grounded, with scores of 45.7% and 84.1%.
- Muse Spark also has the larger context window at 262K.

## Model Snapshot

| Property | Claude Opus 4.5 | Muse Spark |
|----------|----------|----------|
| Creator | Anthropic | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 262K |
| Overall Score | 54.06 | 59.99 |
| Benchmarks Covered | 45 | 27 |
| Pricing (input/output) | $5.00 / $25.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 30.8 (Estimated · #80/119)
- Muse Spark public-lane score: 49.8 (Supported · #43/119)

| Benchmark | Claude Opus 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 59.3% | 59% | Claude Opus 4.5 |
| OSWorld-Verified | 66.3% | Coming soon | Coming soon |
| OSWorld | 66.3% | Coming soon | Coming soon |
| Claw-Eval | 59.6% | 63.8% | Muse Spark |
| 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% | Coming soon | Coming soon |
| MCP Atlas | 42.3% | Coming soon | Coming soon |
| MCP-Tasks | 71.8% | Coming soon | Coming soon |
| WideResearch | 76.4% | Coming soon | Coming soon |
| CyberGym | 50.6% | 43.5% | Claude Opus 4.5 |
| Gert Labs | 64.23% | Coming soon | Coming soon |
| JobBench | 32.3% | Coming soon | Coming soon |
| τ²-bench results | Coming soon | 91.5% | Coming soon |
| DeepSearchQA | Coming soon | 74.8% | Coming soon |

### Coding

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 41.6 (Estimated · #60/144)
- Muse Spark public-lane score: 51.1 (Supported · #39/144)

| Benchmark | Claude Opus 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 80.9% | 77.4% | Claude Opus 4.5 |
| LiveCodeBench v6 | 84.8% | Coming soon | Coming soon |
| SWE-bench Pro | 57.1% | 52.4% | Claude Opus 4.5 |
| SWE Multilingual | 77.5% | Coming soon | Coming soon |
| NL2Repo | 43.2% | Coming soon | Coming soon |
| LiveCodeBench Pro | Coming soon | 80.0% | Coming soon |
| Vibe Code Bench | Coming soon | 19.67% | Coming soon |
| SWE-bench (Vals) | Coming soon | 74.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.5 public-lane score: 73.3 (Unranked · 4 rankable rows)
- Muse Spark public-lane score: 53.4 (Unranked · 3 rankable rows)

| Benchmark | Claude Opus 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 64.4% | Coming soon | Coming soon |
| AI-Needle | 74% | Coming soon | Coming soon |
| ARC-AGI-2 | Coming soon | 42.5% | Coming soon |

### Multimodal & Grounded

- Winner: Muse Spark
- Claude Opus 4.5 public-lane score: 24.5 (#47/49)
- Muse Spark public-lane score: 78.5 (#14/49)

| Benchmark | Claude Opus 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 70.6% | 80.4% | Muse Spark |
| MathVision | 74.3% | Coming soon | Coming soon |
| CharXiv | 68.5% | 86.4% | Muse Spark |
| VideoMMMU | 84.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 45.7% | 84.1% | Muse Spark |
| V* | 67.0% | Coming soon | Coming soon |
| ERQA | Coming soon | 64.7% | Coming soon |
| SimpleVQA | Coming soon | 71.3% | Coming soon |
| ZeroBench | Coming soon | 33.0% | Coming soon |
| MedXpertQA (MM) | Coming soon | 78.4% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 49.4 (Estimated · #68/171)
- Muse Spark public-lane score: 60.3 (Supported · #40/171)

| Benchmark | Claude Opus 4.5 | Muse Spark | 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% | 50.4% | Muse Spark |
| GPQA-D | Coming soon | 89.5% | Coming soon |
| HLE w/o tools | Coming soon | 42.8% | Coming soon |
| HealthBench Hard | Coming soon | 42.8% | Coming soon |
| MedXpertQA (Text) | Coming soon | 52.6% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 89.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 87.3% | Coming soon |

### Multilingual

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

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

### Instruction Following

- Winner: Directional only
- Claude Opus 4.5 public-lane score: 30.6 (#115/125)
- Muse Spark public-lane score: 91.9 (#8/125)

| Benchmark | Claude Opus 4.5 | Muse Spark | 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 public-lane score: 55.1 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.5 | Muse Spark | 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% | 39.000% | Muse Spark |
| FrontierMath v2 (Tier 4) | 4.167% | 14.600% | Muse Spark |

## FAQ

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

Muse Spark is ahead overall on BenchLM right now.

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

The widest category gap is in instruction following, where the averages are 30.6 for Claude Opus 4.5 and 91.9 for Muse Spark.

### 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 cover on BenchLM?

Muse Spark currently has 27 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 vs Claude Opus 4.5 Thinking](/compare/claude-opus-4-5-thinking-vs-muse-spark)
- [Claude Opus 4.5 vs Muse Spark 1.2](/compare/claude-opus-4-5-vs-muse-spark-1-2)
- [Muse Spark vs Muse Spark 1.2](/compare/muse-spark-vs-muse-spark-1-2)

## Explore More

- [Claude Opus 4.5 profile](/models/claude-opus-4-5)
- [Muse Spark profile](/models/muse-spark)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)