# Muse Spark 1.2 vs o3-pro

> Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 42.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-spark-1-2-vs-o3-pro
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Muse Spark 1.2 scores higher in 3 categories and o3-pro in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 23.8.
- The biggest single-benchmark swing is LMCA: 48.4% for Muse Spark 1.2 and 38.5% for o3-pro.
- Muse Spark 1.2 is cheaper at $1.25 / $4.25 per million input/output tokens, against $20 / $80 for o3-pro.
- Muse Spark 1.2 accepts more context: 1.05M tokens versus 200K.

## Snapshot

| | Muse Spark 1.2 | o3-pro |
|---|---|---|
| Provider | Meta | OpenAI |
| Noometry Index | 50.3 | 42.9 |
| Rank | 48 | 105 |
| Context | 1.05M | 200K |
| Input $/M | $1.25 | $20 |
| Output $/M | $4.25 | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- Muse Spark 1.2: 49.2 (#51)
- o3-pro: 55.5 (#24)

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| WeirdML | 60.3% | 58.2% |
| DeepSWE | 54.9% | — |
| Aider Polyglot | — | 84.9% |
| LMArena WebDev | 1533 | — |
| FrontierSWE | 12% | — |
| SciCode | 56.4% | — |
| LMArena Coding | 1495 | — |

## Agentic & Tool Use

- Muse Spark 1.2: 29.4 (#87)
- o3-pro: —

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| APEX-Agents | 36.4% | — |
| GDP.pdf | 16% | — |

## Reasoning

- Muse Spark 1.2: 51.3 (#34)
- o3-pro: 23.8 (#171)

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| DTBench | 94.7% | 86.9% |
| LMCA | 48.4% | 38.5% |
| Epoch Capabilities Index | 154.87 | 147.42 |
| ARC-AGI-2 | — | 4.9% |
| SimpleBench | 74.5% | — |
| Kagi LLM Benchmark | — | 72.1% |
| NYT Connections (extended) | 79.2% | — |
| ARC-AGI-1 | — | 59.3% |
| CritPt | 17.7% | — |
| LMArena Hard Prompts | 1486 | — |

## Math

- Muse Spark 1.2: 46.4 (#70)
- o3-pro: —

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| ProofBench | 43% | — |
| LMArena Math | 1471 | — |

## Knowledge

- Muse Spark 1.2: 54.1 (#53)
- o3-pro: 29.5 (#238)

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| SimpleQA Verified | 60.3% | — |
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
| LMArena Expert | 1480 | — |

## Multimodal

- Muse Spark 1.2: 43.4 (#25)
- o3-pro: —

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| LMArena Vision | 1305 | — |

## Multilingual

- Muse Spark 1.2: 57.1 (#11)
- o3-pro: —

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| LMArena Non-English | 1478 | — |
| LMArena Chinese | 1511 | — |
| LMArena French | 1513 | — |
| LMArena Russian | 1487 | — |
| LMArena Spanish | 1498 | — |

## Instruction Following

- Muse Spark 1.2: 76.7 (#36)
- o3-pro: —

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| LMArena Instruction Following | 1461 | — |

## Long Context

- Muse Spark 1.2: 45.2 (#48)
- o3-pro: 72.2 (#1)

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1475 | — |

## Writing & Preference

- Muse Spark 1.2: 72.3 (#14)
- o3-pro: 57.1 (#133)

| Benchmark | Muse Spark 1.2 | o3-pro |
|---|---|---|
| LMArena Text | 1482 | — |
| LMArena Creative Writing | 1449 | — |
| Short-Story Creative Writing | — | 84.4% |
| EQ-Bench Creative Writing | 1840 | — |
| LMArena Multi-Turn | 1494 | — |

## FAQ

### Is Muse Spark 1.2 better than o3-pro?

Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 42.9 on the Noometry Index.

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

Muse Spark 1.2 is cheaper. It lists at $1.25 per million input tokens and $4.25 per million output tokens; o3-pro lists at $20 and $80.

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

o3-pro scores higher on coding benchmarks: 55.5 versus 49.2 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-pro share?

4 benchmarks have published results for both models. Muse Spark 1.2 has 31 scored results on Noometry and o3-pro has 12.