# GPT-5 Pro vs Muse Spark 1.2

> Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 46.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-pro-vs-muse-spark-1-2
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. GPT-5 Pro scores higher in 2 categories and Muse Spark 1.2 in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 50.4 to 39.2.
- The biggest single-benchmark swing is SimpleBench: 61.6% for GPT-5 Pro and 74.5% for Muse Spark 1.2.
- Muse Spark 1.2 is cheaper at $1.25 / $4.25 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- Muse Spark 1.2 accepts more context: 1.05M tokens versus 400K.

## Snapshot

| | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 46.2 | 49.8 |
| Rank | 58 | 44 |
| Context | 400K | 1.05M |
| Input $/M | $15 | $1.25 |
| Output $/M | $120 | $4.25 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5 Pro: 43.4 (#77)
- Muse Spark 1.2: 48.6 (#49)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| WeirdML | 60.4% | 60.3% |
| DeepSWE | — | 54.9% |
| LMArena WebDev | — | 1532 |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| LMArena Coding | — | 1497 |
| AlgoTune | 1.31 | — |

## Agentic & Tool Use

- GPT-5 Pro: —
- Muse Spark 1.2: 29.5 (#77)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |

## Reasoning

- GPT-5 Pro: 39.2 (#52)
- Muse Spark 1.2: 50.4 (#32)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| SimpleBench | 61.6% | 74.5% |
| Epoch Capabilities Index | 150.26 | 155.18 |
| ARC-AGI-2 | 18.3% | — |
| Kagi LLM Benchmark | 76.8% | — |
| NYT Connections (extended) | — | 79.2% |
| ARC-AGI-1 | 70.2% | — |
| CritPt | — | 17.7% |
| EnigmaEval | 18.8% | — |
| LMArena Hard Prompts | — | 1490 |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |

## Math

- GPT-5 Pro: 48.0 (#53)
- Muse Spark 1.2: 43.8 (#68)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| ProofBench | — | 43% |
| FrontierMath Tier 4 (v1) | 14.6% | — |

## Knowledge

- GPT-5 Pro: 56.2 (#39)
- Muse Spark 1.2: 53.9 (#49)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |
| SimpleQA Verified | — | 60.3% |
| LMArena Expert | — | 1485 |

## Multimodal

- GPT-5 Pro: —
- Muse Spark 1.2: 42.6 (#24)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | — | 1304 |

## Multilingual

- GPT-5 Pro: —
- Muse Spark 1.2: 57.4 (#10)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | — | 1479 |
| LMArena Chinese | — | 1519 |
| LMArena Russian | — | 1494 |

## Instruction Following

- GPT-5 Pro: —
- Muse Spark 1.2: 77.1 (#30)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | — | 1466 |

## Long Context

- GPT-5 Pro: —
- Muse Spark 1.2: 45.4 (#35)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | — | 1483 |

## Writing & Preference

- GPT-5 Pro: —
- Muse Spark 1.2: 72.6 (#14)

| Benchmark | GPT-5 Pro | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | — | 1486 |
| LMArena Creative Writing | — | 1444 |
| EQ-Bench Creative Writing | — | 1840 |
| LMArena Multi-Turn | — | 1504 |

## FAQ

### Is GPT-5 Pro better than Muse Spark 1.2?

Muse Spark 1.2 is the stronger model overall, scoring 49.8 to 46.2 on the Noometry Index.

### Which is cheaper, GPT-5 Pro or Muse Spark 1.2?

Muse Spark 1.2 is cheaper. It lists at $1.25 per million input tokens and $4.25 per million output tokens; GPT-5 Pro lists at $15 and $120.

### Is GPT-5 Pro or Muse Spark 1.2 better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 48.6 versus 43.4 in the Noometry coding category.

### Which has the bigger context window?

Muse Spark 1.2 does, with 1.05M tokens against 400K.

### How many benchmarks do GPT-5 Pro and Muse Spark 1.2 share?

3 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Muse Spark 1.2 has 28.