# GPT-5.4 mini vs Muse Spark 1.3

> Side-by-side benchmark comparison for GPT-5.4 mini and Muse Spark 1.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-mini-vs-muse-spark-1-3
- Last updated: October 17, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.4 mini and Muse Spark 1.3 share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Muse Spark 1.3 has the lower published output-token price.
- Muse Spark 1.3 has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.4 mini | Muse Spark 1.3 |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 53.41 | null |
| Benchmarks Covered | 22 | 20 |
| Pricing (input/output) | $0.75 / $4.50 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 35.9 (Supported · #78/128)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | Coming soon | Coming soon |
| 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% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 54.7% | 72.3% | Muse Spark 1.3 |
| Terminal-Bench 2.1 | Coming soon | 88.8% | Coming soon |
| JobBench | Coming soon | 64.9% | Coming soon |
| OSWorld 2.0 | Coming soon | 66.9% | Coming soon |
| DeepSearchQA | Coming soon | 89.4% | Coming soon |
| AutomationBench | Coming soon | 49.4% | Coming soon |
| ApprenticeBench | Coming soon | 19% | Coming soon |
| CWE-bench v1 | Coming soon | 55.0% | Coming soon |
| MazeBench | Coming soon | 0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 35.1 (Supported · #77/150)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60.0% | Coming soon | Coming soon |
| Vibe Code Bench | 47.97% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 27.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 73.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 88.8% | Coming soon |
| DeepSWE | Coming soon | 75.4% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 59.4% | Coming soon |
| CursorBench 4.0 | Coming soon | 41.6% | Coming soon |
| Bug Hunt Bench | Coming soon | 32.2 fixes | Coming soon |
| FrontierSWE v2 | Coming soon | 25.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 43.7 (Unranked · 4 rankable rows)
- Muse Spark 1.3 public-lane score: 82.9 (#6/28)

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 63.70% | Coming soon | Coming soon |
| ARC-AGI-2 | 18.9% | Coming soon | Coming soon |
| MRCR v2 256K-512K | Coming soon | 98.5% | Coming soon |
| MRCR v2 512K-1M | Coming soon | 98.1% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 73.8 (#28/54)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.6% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 78% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 51.5 (Supported · #74/184)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 88% | Coming soon | Coming soon |
| HLE | 41.5% | Coming soon | Coming soon |
| HLE w/o tools | 28.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 83.1% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 84.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 89.9 (#27/148)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 15.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 55.9 (Unranked · 2 rankable rows)
- Muse Spark 1.3 public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.4 mini | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 51.228% | 74.035% | Muse Spark 1.3 |
| FrontierMath v2 (Tier 4) | 9.756% | 46.341% | Muse Spark 1.3 |

## FAQ

### Is there enough evidence to pick between GPT-5.4 mini and Muse Spark 1.3?

Not yet. The models share only 3 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [Muse Spark 1.3 vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-muse-spark-1-3)
- [GPT-5.4 mini vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Muse Spark 1.3 vs GPT-5.4](/compare/gpt-5-4-vs-muse-spark-1-3)

## Explore More

- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Muse Spark 1.3 profile](/models/muse-spark-1-3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)