# GPT-4.1 nano vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.3 to 27.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-1-nano-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. GPT-4.1 nano scores higher in 0 categories and Muse Spark in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 21.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 28.9% for GPT-4.1 nano and 88.9% for Muse Spark.

## Snapshot

| | GPT-4.1 nano | Muse Spark |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 27.7 | 50.3 |
| Rank | 322 | 41 |
| Context | 1.05M | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.40 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4.1 nano: 23.8 (#325)
- Muse Spark: 45.6 (#65)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| SciCode | 25.9% | 51.5% |
| LMArena Coding | 1306 | 1482 |
| Aider Polyglot | 8.9% | — |
| WeirdML | 19% | — |

## Agentic & Tool Use

- GPT-4.1 nano: 26.3 (#98)
- Muse Spark: —

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| Berkeley Function Calling Leaderboard | 33% | — |

## Reasoning

- GPT-4.1 nano: 8.6 (#344)
- Muse Spark: 34.9 (#61)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| CritPt | 0% | 11.3% |
| LMArena Hard Prompts | 1286 | 1475 |
| Epoch Capabilities Index | 129.62 | 152.09 |
| ARC-AGI-2 | 0% | — |
| Kagi LLM Benchmark | 33.3% | — |
| ARC-AGI-1 | 0% | — |
| DTBench | 52.5% | — |
| LMCA | 5.5% | — |

## Math

- GPT-4.1 nano: 25.5 (#246)
- Muse Spark: 46.8 (#57)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 28.9% | 88.9% |
| LMArena Math | 1274 | 1455 |
| FrontierMath (Feb 2025 set) | 1% | 39% |
| ProofBench | — | 17% |
| Omni-MATH | 36.7% | — |
| MATH Level 5 | 70% | — |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- GPT-4.1 nano: 21.8 (#268)
- Muse Spark: 65.7 (#12)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| GPQA Diamond | 48.9% | 89.8% |
| LMArena Expert | 1272 | 1458 |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 6% | — |
| MMLU-Pro | 55% | — |
| GPQA (HELM) | 50.7% | — |

## Multimodal

- GPT-4.1 nano: 28.6 (#108)
- Muse Spark: 42.7 (#23)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| LMArena Vision | 1063 | 1306 |
| LMArena Document | — | 1444 |

## Multilingual

- GPT-4.1 nano: 41.8 (#200)
- Muse Spark: 56.3 (#23)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| LMArena Non-English | 1260 | 1464 |
| LMArena Chinese | 1270 | 1507 |
| LMArena German | 1288 | 1497 |
| LMArena Russian | 1261 | 1467 |
| LMArena French | — | 1497 |
| LMArena Japanese | 1199 | — |
| LMArena Korean | — | 1457 |
| LMArena Spanish | — | 1471 |

## Instruction Following

- GPT-4.1 nano: 68.0 (#188)
- Muse Spark: 76.1 (#47)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1267 | 1443 |
| IFEval | 84.3% | — |

## Long Context

- GPT-4.1 nano: 23.7 (#291)
- Muse Spark: 44.4 (#65)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1283 | 1451 |
| Fiction.LiveBench | 25% | — |

## Writing & Preference

- GPT-4.1 nano: 40.7 (#238)
- Muse Spark: 66.2 (#37)

| Benchmark | GPT-4.1 nano | Muse Spark |
|---|---|---|
| LMArena Text | 1285 | 1474 |
| LMArena Creative Writing | 1260 | 1460 |
| LMArena Multi-Turn | 1277 | 1477 |
| EQ-Bench Creative Writing | 946 | — |
| WildBench | 81.2% | — |

## FAQ

### Is GPT-4.1 nano better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.3 to 27.7 on the Noometry Index.

### Is GPT-4.1 nano or Muse Spark better for coding?

Muse Spark scores higher on coding benchmarks: 45.6 versus 23.8 in the Noometry coding category.

### How many benchmarks do GPT-4.1 nano and Muse Spark share?

20 benchmarks have published results for both models. GPT-4.1 nano has 38 scored results on Noometry and Muse Spark has 27.