# Grok 4 Heavy vs Muse Spark

> Muse Spark has enough public results to be ranked (#46); Grok 4 Heavy does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/grok-4-heavy-vs-muse-spark
- Last updated: 2026-10-11
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both.

## Snapshot

| | Grok 4 Heavy | Muse Spark |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | — | 50.6 |
| Rank | — | 46 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4 Heavy: —
- Muse Spark: 46.2 (#69)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| SciCode | — | 51.5% |
| LMArena Coding | — | 1481 |

## Reasoning

- Grok 4 Heavy: —
- Muse Spark: 35.9 (#67)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| CritPt | — | 11.3% |
| LMArena Hard Prompts | — | 1474 |
| Epoch Capabilities Index | — | 152.04 |

## Math

- Grok 4 Heavy: —
- Muse Spark: 47.8 (#66)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| FrontierMath Tier 4 (v1) | 2.1% | 14.6% |
| OTIS Mock AIME 2024-2025 | — | 88.9% |
| ProofBench | — | 17% |
| LMArena Math | — | 1455 |
| FrontierMath (Feb 2025 set) | — | 39% |

## Knowledge

- Grok 4 Heavy: —
- Muse Spark: 65.7 (#13)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| GPQA Diamond | — | 89.8% |
| Humanity's Last Exam | — | 40.6% |
| LMArena Expert | — | 1457 |

## Multimodal

- Grok 4 Heavy: —
- Muse Spark: 43.4 (#24)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| LMArena Vision | — | 1306 |
| LMArena Document | — | 1444 |

## Multilingual

- Grok 4 Heavy: —
- Muse Spark: 56.1 (#24)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| LMArena Non-English | — | 1464 |
| LMArena Chinese | — | 1509 |
| LMArena French | — | 1497 |
| LMArena German | — | 1497 |
| LMArena Korean | — | 1459 |
| LMArena Russian | — | 1466 |
| LMArena Spanish | — | 1472 |

## Instruction Following

- Grok 4 Heavy: —
- Muse Spark: 75.9 (#51)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| LMArena Instruction Following | — | 1442 |

## Long Context

- Grok 4 Heavy: —
- Muse Spark: 44.4 (#69)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| LMArena Longer Query | — | 1451 |

## Writing & Preference

- Grok 4 Heavy: —
- Muse Spark: 66.0 (#39)

| Benchmark | Grok 4 Heavy | Muse Spark |
|---|---|---|
| LMArena Text | — | 1474 |
| LMArena Creative Writing | — | 1459 |
| LMArena Multi-Turn | — | 1477 |

## FAQ

### Is Grok 4 Heavy better than Muse Spark?

Muse Spark has enough public results to be ranked (#46); Grok 4 Heavy does not yet, so treat this comparison as directional.

### How many benchmarks do Grok 4 Heavy and Muse Spark share?

1 benchmark has published results for both models. Grok 4 Heavy has 1 scored results on Noometry and Muse Spark has 27.