# GPT-5.4 mini vs Muse Spark

> Side-by-side benchmark comparison for GPT-5.4 mini and Muse Spark across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 12
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Muse Spark if you want the stronger benchmark profile. GPT-5.4 mini 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 53.89.
- The clearest category separation is in multimodal & grounded, where the averages are 58.3 for GPT-5.4 mini and 78.5 for Muse Spark.
- The biggest single benchmark swing is Vibe Code Bench in Coding, with scores of 47.97% and 19.67%.
- GPT-5.4 mini also has the larger context window at 400K.

## Model Snapshot

| Property | GPT-5.4 mini | Muse Spark |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 262K |
| Overall Score | 53.89 | 59.99 |
| Benchmarks Covered | 21 | 27 |
| Pricing (input/output) | $0.75 / $4.50 | N/A |

## Category Breakdown

### Agentic

- Winner: Muse Spark
- GPT-5.4 mini public-lane score: 34.1 (Supported · #73/119)
- Muse Spark public-lane score: 49.8 (Supported · #43/119)

| Benchmark | GPT-5.4 mini | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | 59% | GPT-5.4 mini |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| MCP Atlas | 57.7% | Coming soon | Coming soon |
| Toolathlon | 42.9% | Coming soon | Coming soon |
| τ²-bench results | 93.4% | 91.5% | GPT-5.4 mini |
| Terminal-Bench 2.1 (Vals) | 54.7% | Coming soon | 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
- GPT-5.4 mini public-lane score: 36.4 (Supported · #72/144)
- Muse Spark public-lane score: 51.1 (Supported · #39/144)

| Benchmark | GPT-5.4 mini | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 47.97% | 19.67% | GPT-5.4 mini |
| FrontierCode 1.1 Main | 27.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 73.0% | 74.4% | Muse Spark |
| SWE-bench Verified | Coming soon | 77.4% | Coming soon |
| SWE-bench Pro | Coming soon | 52.4% | Coming soon |
| LiveCodeBench Pro | Coming soon | 80.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.4 mini public-lane score: 40 (Unranked · 4 rankable rows)
- Muse Spark public-lane score: 53.4 (Unranked · 3 rankable rows)

| Benchmark | GPT-5.4 mini | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 63.70% | Coming soon | Coming soon |
| ARC-AGI-2 | 18.9% | 42.5% | Muse Spark |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.4 mini public-lane score: 58.3 (#32/49)
- Muse Spark public-lane score: 78.5 (#14/49)

| Benchmark | GPT-5.4 mini | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.6% | 80.4% | Muse Spark |
| MMMU-Pro w/ Python | 78% | Coming soon | Coming soon |
| CharXiv | Coming soon | 86.4% | 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: Muse Spark
- GPT-5.4 mini public-lane score: 48.6 (Supported · #71/171)
- Muse Spark public-lane score: 60.3 (Supported · #40/171)

| Benchmark | GPT-5.4 mini | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 88% | Coming soon | Coming soon |
| HLE | 41.5% | 50.4% | Muse Spark |
| HLE w/o tools | 28.2% | 42.8% | Muse Spark |
| GPQA Diamond (Vals) | 83.1% | 89.6% | Muse Spark |
| MMLU-Pro (Vals) | 84.6% | 87.3% | Muse Spark |
| GPQA-D | Coming soon | 89.5% | Coming soon |
| HealthBench Hard | Coming soon | 42.8% | Coming soon |
| MedXpertQA (Text) | Coming soon | 52.6% | Coming soon |

### Instruction Following

- Winner: Directional only
- GPT-5.4 mini public-lane score: 88.5 (#24/125)
- Muse Spark public-lane score: 91.9 (#8/125)

### Mathematics

- Winner: Not comparable
- GPT-5.4 mini public-lane score: 44.3 (Unranked · 2 rankable rows)
- Muse Spark public-lane score: 55.1 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.4 mini | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 28.280% | 39.000% | Muse Spark |
| FrontierMath v2 (Tier 4) | 2.080% | 14.600% | Muse Spark |

## FAQ

### Which is better overall, GPT-5.4 mini or Muse Spark?

Muse Spark is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 mini and Muse Spark?

The widest category gap is in multimodal & grounded, where the averages are 58.3 for GPT-5.4 mini and 78.5 for Muse Spark.

### How many benchmarks does GPT-5.4 mini cover on BenchLM?

GPT-5.4 mini currently has 21 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

- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [Muse Spark vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-muse-spark)
- [GPT-5.4 mini vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Muse Spark vs GPT-5.4](/compare/gpt-5-4-vs-muse-spark)

## Explore More

- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Muse Spark profile](/models/muse-spark)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)