# GPT-5.4 mini vs Muse Spark 1.1

> Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 44.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-4-mini-vs-muse-spark-1-1
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. GPT-5.4 mini scores higher in 1 category and Muse Spark 1.1 in 9 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.1 leads 45.9 to 30.3.
- The biggest single-benchmark swing is SimpleQA Verified: 29.4% for GPT-5.4 mini and 57.8% for Muse Spark 1.1.
- GPT-5.4 mini is cheaper at $0.75 / $4.50 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.1.
- Muse Spark 1.1 accepts more context: 1.05M tokens versus 400K.

## Snapshot

| | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 44.8 | 49.9 |
| Rank | 69 | 43 |
| Context | 400K | 1.05M |
| Input $/M | $0.75 | $1.25 |
| Output $/M | $4.50 | $4.25 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.4 mini: 45.0 (#67)
- Muse Spark 1.1: 50.8 (#38)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| LMArena WebDev | 1397 | 1542 |
| SciCode | 49.9% | 58.8% |
| LMArena Coding | 1438 | 1497 |
| DeepSWE | — | 53.3% |
| FrontierCode | 27% | — |
| WeirdML | 60.3% | — |
| ALE-Bench | 1,189 | — |

## Agentic & Tool Use

- GPT-5.4 mini: 29.6 (#74)
- Muse Spark 1.1: 33.9 (#45)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| τ²-bench Banking | — | 40.5% |
| DeepResearch Bench | 36.3% | — |
| GBAEval | — | 7.9% |
| GDP.pdf | — | 15% |
| Vending-Bench 2 | — | 6,520 |

## Reasoning

- GPT-5.4 mini: 30.3 (#77)
- Muse Spark 1.1: 45.9 (#41)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| NYT Connections (extended) | 61.8% | 84.9% |
| CritPt | 10% | 15.1% |
| LMArena Hard Prompts | 1424 | 1486 |
| DTBench | 80% | 94.4% |
| LMCA | 40.8% | 49.9% |
| Epoch Capabilities Index | 148.83 | 154.32 |
| ARC-AGI-2 | 18.9% | — |
| Kagi LLM Benchmark | 37.9% | — |
| ARC-AGI-1 | 63.7% | — |
| Chess Puzzles | 24% | — |
| Thematic Generalization | 61.7% | — |
| Mystery Game Puzzles | 11% | — |
| Surface Evolver Bench | — | 52.5% |
| ForecastBench | 57 | — |

## Math

- GPT-5.4 mini: 45.4 (#63)
- Muse Spark 1.1: 44.0 (#67)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| ProofBench | 21% | 39% |
| LMArena Math | 1418 | 1477 |
| FrontierMath (Tiers 1-3) | 51.2% | — |
| FrontierMath Tier 4 | 9.8% | — |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| FrontierMath (Feb 2025 set) | 28.3% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- GPT-5.4 mini: 51.4 (#62)
- Muse Spark 1.1: 52.8 (#55)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| SimpleQA Verified | 29.4% | 57.8% |
| LMArena Expert | 1434 | 1480 |
| GPQA Diamond | 86.9% | — |
| Vectara Hallucination Rate | 5.5% | — |

## Multimodal

- GPT-5.4 mini: 39.0 (#51)
- Muse Spark 1.1: 41.9 (#28)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| LMArena Vision | 1245 | 1292 |
| LMArena Document | — | 1465 |

## Multilingual

- GPT-5.4 mini: 52.1 (#94)
- Muse Spark 1.1: 56.8 (#16)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| LMArena Non-English | 1405 | 1471 |
| LMArena Chinese | 1446 | 1518 |
| LMArena French | 1440 | 1494 |
| LMArena German | 1407 | 1466 |
| LMArena Japanese | 1375 | 1445 |
| LMArena Korean | 1369 | 1459 |
| LMArena Russian | 1417 | 1482 |
| LMArena Spanish | 1403 | 1471 |

## Instruction Following

- GPT-5.4 mini: 74.3 (#99)
- Muse Spark 1.1: 76.8 (#36)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| LMArena Instruction Following | 1405 | 1457 |

## Long Context

- GPT-5.4 mini: 42.9 (#107)
- Muse Spark 1.1: 44.8 (#55)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| LMArena Longer Query | 1407 | 1463 |

## Writing & Preference

- GPT-5.4 mini: 64.2 (#56)
- Muse Spark 1.1: 73.6 (#11)

| Benchmark | GPT-5.4 mini | Muse Spark 1.1 |
|---|---|---|
| LMArena Text | 1411 | 1479 |
| LMArena Creative Writing | 1370 | 1440 |
| EQ-Bench Creative Writing | 1665 | 1927 |
| LMArena Multi-Turn | 1429 | 1484 |
| EQ-Bench 4 | — | 1260 |

## FAQ

### Is GPT-5.4 mini better than Muse Spark 1.1?

Muse Spark 1.1 is the stronger model overall, scoring 49.9 to 44.8 on the Noometry Index.

### Which is cheaper, GPT-5.4 mini or Muse Spark 1.1?

GPT-5.4 mini is cheaper. It lists at $0.75 per million input tokens and $4.50 per million output tokens; Muse Spark 1.1 lists at $1.25 and $4.25.

### Is GPT-5.4 mini or Muse Spark 1.1 better for coding?

Muse Spark 1.1 scores higher on coding benchmarks: 50.8 versus 45.0 in the Noometry coding category.

### Which has the bigger context window?

Muse Spark 1.1 does, with 1.05M tokens against 400K.

### How many benchmarks do GPT-5.4 mini and Muse Spark 1.1 share?

28 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Muse Spark 1.1 has 36.