# Muse Spark 1.2 vs o3

> Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 47.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-1-2-vs-o3
- Last updated: 2026-10-11
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Muse Spark 1.2 scores higher in 6 categories and o3 in 4 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 32.0.
- The biggest single-benchmark swing is SimpleBench: 74.5% for Muse Spark 1.2 and 53.1% for o3.
- Muse Spark 1.2 is cheaper at $1.25 / $4.25 per million input/output tokens, against $2 / $8 for o3.
- Muse Spark 1.2 accepts more context: 1.05M tokens versus 200K.

## Snapshot

| | Muse Spark 1.2 | o3 |
|---|---|---|
| Provider | Meta | OpenAI |
| Noometry Index | 50.3 | 47.5 |
| Rank | 48 | 61 |
| Context | 1.05M | 200K |
| Input $/M | $1.25 | $2 |
| Output $/M | $4.25 | $8 |
| Weights | Proprietary | Proprietary |

## Coding

- Muse Spark 1.2: 49.2 (#51)
- o3: 46.8 (#64)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| WeirdML | 60.3% | 52.4% |
| LMArena Coding | 1495 | 1408 |
| SWE-bench Verified | — | 62.3% |
| DeepSWE | 54.9% | — |
| SWE-bench Verified (bash only) | — | 58.4% |
| Aider Polyglot | — | 81.3% |
| LMArena WebDev | 1533 | — |
| FrontierSWE | 12% | — |
| SciCode | 56.4% | — |
| GSO | — | 8.8% |
| CadEval | — | 74% |
| ALE-Bench | — | 933.55 |

## Agentic & Tool Use

- Muse Spark 1.2: 29.4 (#87)
- o3: 34.5 (#44)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| APEX-Agents | 36.4% | — |
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| GDP.pdf | 16% | — |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |

## Reasoning

- Muse Spark 1.2: 51.3 (#34)
- o3: 32.0 (#78)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| SimpleBench | 74.5% | 53.1% |
| CritPt | 17.7% | 1.4% |
| LMArena Hard Prompts | 1486 | 1402 |
| DTBench | 94.7% | 84.8% |
| LMCA | 48.4% | 39.7% |
| Epoch Capabilities Index | 154.87 | 146.86 |
| ARC-AGI-2 | — | 6.5% |
| Kagi LLM Benchmark | — | 67.6% |
| NYT Connections (extended) | 79.2% | — |
| ARC-AGI-1 | — | 60.8% |
| Chess Puzzles | — | 38% |
| EnigmaEval | — | 13.1% |
| Mystery Game Puzzles | — | 29% |
| ForecastBench | — | 62.5 |

## Math

- Muse Spark 1.2: 46.4 (#70)
- o3: 50.2 (#58)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| LMArena Math | 1471 | 1426 |
| FrontierMath (Tiers 1-3) | — | 33.3% |
| OTIS Mock AIME 2024-2025 | — | 84.4% |
| ProofBench | 43% | — |
| Omni-MATH | — | 71.4% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 18.7% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Muse Spark 1.2: 54.1 (#53)
- o3: 54.6 (#52)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| SimpleQA Verified | 60.3% | 49.4% |
| LMArena Expert | 1480 | 1402 |
| GPQA Diamond | — | 81.8% |
| Humanity's Last Exam | — | 20.3% |
| MMLU-Pro | — | 85.9% |
| Confabulations | — | 14.4% |
| GPQA (HELM) | — | 75.3% |

## Multimodal

- Muse Spark 1.2: 43.4 (#25)
- o3: 41.4 (#36)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| LMArena Vision | 1305 | 1214 |
| GeoBench | — | 74% |
| VPCT | — | 52% |

## Multilingual

- Muse Spark 1.2: 57.1 (#11)
- o3: 51.7 (#105)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| LMArena Non-English | 1478 | 1401 |
| LMArena Chinese | 1511 | 1437 |
| LMArena French | 1513 | 1430 |
| LMArena Russian | 1487 | 1406 |
| LMArena Spanish | 1498 | 1395 |
| LMArena German | — | 1420 |
| LMArena Japanese | — | 1403 |
| LMArena Korean | — | 1370 |

## Instruction Following

- Muse Spark 1.2: 76.7 (#36)
- o3: 72.8 (#127)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| LMArena Instruction Following | 1461 | 1368 |
| IFEval | — | 86.9% |

## Long Context

- Muse Spark 1.2: 45.2 (#48)
- o3: 53.3 (#6)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| LMArena Longer Query | 1475 | 1372 |
| Fiction.LiveBench | — | 88.9% |
| CL-bench | — | 17.8% |

## Writing & Preference

- Muse Spark 1.2: 72.3 (#14)
- o3: 63.5 (#64)

| Benchmark | Muse Spark 1.2 | o3 |
|---|---|---|
| LMArena Text | 1482 | 1410 |
| LMArena Creative Writing | 1449 | 1359 |
| EQ-Bench Creative Writing | 1840 | 1676 |
| LMArena Multi-Turn | 1494 | 1405 |
| Short-Story Creative Writing | — | 83.9% |
| WildBench | — | 86.1% |

## FAQ

### Is Muse Spark 1.2 better than o3?

Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 47.5 on the Noometry Index.

### Which is cheaper, Muse Spark 1.2 or o3?

Muse Spark 1.2 is cheaper. It lists at $1.25 per million input tokens and $4.25 per million output tokens; o3 lists at $2 and $8.

### Is Muse Spark 1.2 or o3 better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 46.8 in the Noometry coding category.

### Which has the bigger context window?

Muse Spark 1.2 does, with 1.05M tokens against 200K.

### How many benchmarks do Muse Spark 1.2 and o3 share?

23 benchmarks have published results for both models. Muse Spark 1.2 has 31 scored results on Noometry and o3 has 63.