# GPT-5 Nano vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.3 to 33.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-nano-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. GPT-5 Nano scores higher in 0 categories and Muse Spark in 9 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 35.8.
- The biggest single-benchmark swing is GPQA Diamond: 69.4% for GPT-5 Nano and 89.8% for Muse Spark.

## Snapshot

| | GPT-5 Nano | Muse Spark |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 33.4 | 50.3 |
| Rank | 234 | 41 |
| Context | 400K | — |
| Input $/M | $0.05 | — |
| Output $/M | $0.40 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5 Nano: 33.3 (#248)
- Muse Spark: 45.6 (#65)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Coding | 1351 | 1482 |
| SWE-bench Verified (bash only) | 34.8% | — |
| SciCode | — | 51.5% |
| WeirdML | 38.1% | — |
| ALE-Bench | 718.67 | — |

## Agentic & Tool Use

- GPT-5 Nano: 25.6 (#99)
- Muse Spark: —

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| Terminal-Bench | 21.8% | — |
| Berkeley Function Calling Leaderboard | 51.5% | — |

## Reasoning

- GPT-5 Nano: 16.4 (#291)
- Muse Spark: 34.9 (#61)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Hard Prompts | 1329 | 1475 |
| Epoch Capabilities Index | 139.39 | 152.09 |
| ARC-AGI-2 | 2.6% | — |
| Kagi LLM Benchmark | 62.2% | — |
| ARC-AGI-1 | 20.7% | — |
| CritPt | — | 11.3% |
| Chess Puzzles | 27% | — |
| Mystery Game Puzzles | 9% | — |
| DTBench | 62.7% | — |
| LMCA | 7.9% | — |
| ForecastBench | 59.1 | — |

## Math

- GPT-5 Nano: 29.1 (#221)
- Muse Spark: 46.8 (#57)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 81.1% | 88.9% |
| ProofBench | 12% | 17% |
| LMArena Math | 1318 | 1455 |
| FrontierMath (Feb 2025 set) | 8.3% | 39% |
| FrontierMath Tier 4 (v1) | 2.1% | 14.6% |
| FrontierMath (Tiers 1-3) | 20% | — |
| FrontierMath Tier 4 | 2.4% | — |
| Omni-MATH | 54.6% | — |
| MATH Level 5 | 95.2% | — |

## Knowledge

- GPT-5 Nano: 35.8 (#166)
- Muse Spark: 65.7 (#12)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| GPQA Diamond | 69.4% | 89.8% |
| LMArena Expert | 1321 | 1458 |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 11.7% | — |
| MMLU-Pro | 77.8% | — |
| Vectara Hallucination Rate | 10.5% | — |
| GPQA (HELM) | 67.9% | — |

## Multimodal

- GPT-5 Nano: 30.7 (#102)
- Muse Spark: 42.7 (#23)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Vision | 1159 | 1306 |
| VPCT | 37.2% | — |
| LMArena Document | — | 1444 |

## Multilingual

- GPT-5 Nano: 45.5 (#167)
- Muse Spark: 56.3 (#23)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Non-English | 1313 | 1464 |
| LMArena Chinese | 1355 | 1507 |
| LMArena German | 1329 | 1497 |
| LMArena Korean | 1269 | 1457 |
| LMArena Russian | 1296 | 1467 |
| LMArena Spanish | 1360 | 1471 |
| LMArena French | — | 1497 |

## Instruction Following

- GPT-5 Nano: 75.2 (#72)
- Muse Spark: 76.1 (#47)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1306 | 1443 |
| IFEval | 93.2% | — |

## Long Context

- GPT-5 Nano: 31.3 (#275)
- Muse Spark: 44.4 (#65)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1313 | 1451 |
| Fiction.LiveBench | 44.4% | — |

## Writing & Preference

- GPT-5 Nano: 39.4 (#244)
- Muse Spark: 66.2 (#37)

| Benchmark | GPT-5 Nano | Muse Spark |
|---|---|---|
| LMArena Text | 1320 | 1474 |
| LMArena Creative Writing | 1250 | 1460 |
| LMArena Multi-Turn | 1311 | 1477 |
| EQ-Bench Creative Writing | 705 | — |
| WildBench | 80.6% | — |

## FAQ

### Is GPT-5 Nano better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.3 to 33.4 on the Noometry Index.

### Is GPT-5 Nano or Muse Spark better for coding?

Muse Spark scores higher on coding benchmarks: 45.6 versus 33.3 in the Noometry coding category.

### How many benchmarks do GPT-5 Nano and Muse Spark share?

22 benchmarks have published results for both models. GPT-5 Nano has 48 scored results on Noometry and Muse Spark has 27.