# Claude Haiku 4.5 vs Muse Spark

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

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

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Muse Spark leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Muse Spark has the higher overall point estimate 59.99 to 41.5. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 19.1 for Claude Haiku 4.5 and 51.1 for Muse Spark.
- The biggest single benchmark swing is FrontierMath v2 (Tiers 1-3) in Mathematics, with scores of 5.903% and 39.000%.
- Muse Spark also has the larger context window at 262K.

## Model Snapshot

| Property | Claude Haiku 4.5 | Muse Spark |
|----------|----------|----------|
| Creator | Anthropic | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 262K |
| Overall Score | 41.5 | 59.99 |
| Benchmarks Covered | 10 | 27 |
| Pricing (input/output) | $1.00 / $5.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Muse Spark
- Claude Haiku 4.5 public-lane score: 21.6 (Supported · #97/119)
- Muse Spark public-lane score: 49.8 (Supported · #43/119)

| Benchmark | Claude Haiku 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 16.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 43.8% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59% | Coming soon |
| τ²-bench results | Coming soon | 91.5% | Coming soon |
| DeepSearchQA | Coming soon | 74.8% | Coming soon |
| CyberGym | Coming soon | 43.5% | Coming soon |
| Claw-Eval | Coming soon | 63.8% | Coming soon |

### Coding

- Winner: Muse Spark
- Claude Haiku 4.5 public-lane score: 19.1 (Supported · #119/144)
- Muse Spark public-lane score: 51.1 (Supported · #39/144)

| Benchmark | Claude Haiku 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 73.3% | 77.4% | Muse Spark |
| VulcanBench v3 | 76.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 41.2% | Coming soon | Coming soon |
| SWE-bench (Vals) | 66.6% | 74.4% | Muse Spark |
| SWE-bench Pro | Coming soon | 52.4% | Coming soon |
| LiveCodeBench Pro | Coming soon | 80.0% | Coming soon |
| Vibe Code Bench | Coming soon | 19.67% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Muse Spark public-lane score: 53.4 (Unranked · 3 rankable rows)

| Benchmark | Claude Haiku 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 42.5% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Muse Spark public-lane score: 78.5 (#14/49)

| Benchmark | Claude Haiku 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | Coming soon | 86.4% | Coming soon |
| MMMU-Pro | Coming soon | 80.4% | Coming soon |
| ERQA | Coming soon | 64.7% | Coming soon |
| SimpleVQA | Coming soon | 71.3% | Coming soon |
| ScreenSpot Pro | Coming soon | 84.1% | Coming soon |
| ZeroBench | Coming soon | 33.0% | Coming soon |
| MedXpertQA (MM) | Coming soon | 78.4% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Haiku 4.5 public-lane score: 34.9 (Estimated · #119/171)
- Muse Spark public-lane score: 60.3 (Supported · #40/171)

| Benchmark | Claude Haiku 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 72.2% | 89.6% | Muse Spark |
| MMLU-Pro (Vals) | 78.7% | 87.3% | Muse Spark |
| GPQA-D | Coming soon | 89.5% | Coming soon |
| HLE | Coming soon | 50.4% | 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 |

### Instruction Following

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Muse Spark public-lane score: 91.9 (#8/125)

### Mathematics

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: 28.8 (Unranked · 2 rankable rows)
- Muse Spark public-lane score: 55.1 (Unranked · 2 rankable rows)

| Benchmark | Claude Haiku 4.5 | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 5.903% | 39.000% | Muse Spark |
| FrontierMath v2 (Tier 4) | 2.083% | 14.600% | Muse Spark |

## FAQ

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

Muse Spark has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

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

The widest category gap is in coding, where the averages are 19.1 for Claude Haiku 4.5 and 51.1 for Muse Spark.

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

Claude Haiku 4.5 currently has 10 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 Haiku 4.5 vs Claude Haiku 4.5 Thinking](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [Muse Spark vs Claude Haiku 4.5 Thinking](/compare/claude-haiku-4-5-thinking-vs-muse-spark)
- [Claude Haiku 4.5 vs Muse Spark 1.2](/compare/claude-haiku-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 Haiku 4.5 profile](/models/claude-haiku-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)