# Grok 4.3 vs Muse Spark

> Muse Spark is the stronger model overall, scoring 50.6 to 43.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Grok 4.3 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 52.5.
- The biggest single-benchmark swing is ProofBench: 11% for Grok 4.3 and 17% for Muse Spark.

## Snapshot

| | Grok 4.3 | Muse Spark |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 43.8 | 50.6 |
| Rank | 86 | 46 |
| Context | 1M | — |
| Input $/M | $1.25 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.3: 41.6 (#121)
- Muse Spark: 46.2 (#69)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| SciCode | 47.3% | 51.5% |
| LMArena Coding | 1415 | 1481 |
| LMArena WebDev | 1357 | — |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |

## Agentic & Tool Use

- Grok 4.3: 27.7 (#99)
- Muse Spark: —

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |

## Reasoning

- Grok 4.3: 35.9 (#68)
- Muse Spark: 35.9 (#67)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| CritPt | 8% | 11.3% |
| LMArena Hard Prompts | 1396 | 1474 |
| Epoch Capabilities Index | 149.16 | 152.04 |
| NYT Connections (extended) | 55.2% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 46.0 (#74)
- Muse Spark: 47.8 (#66)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 93.3% | 88.9% |
| ProofBench | 11% | 17% |
| LMArena Math | 1388 | 1455 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |

## Knowledge

- Grok 4.3: 52.5 (#62)
- Muse Spark: 65.7 (#13)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| GPQA Diamond | 88.8% | 89.8% |
| LMArena Expert | 1385 | 1457 |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#104)
- Muse Spark: 43.4 (#24)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| LMArena Vision | 1229 | 1306 |
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | — | 1444 |

## Multilingual

- Grok 4.3: 50.5 (#120)
- Muse Spark: 56.1 (#24)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1385 | 1464 |
| LMArena Chinese | 1422 | 1509 |
| LMArena French | 1412 | 1497 |
| LMArena German | 1395 | 1497 |
| LMArena Korean | 1356 | 1459 |
| LMArena Russian | 1399 | 1466 |
| LMArena Spanish | 1398 | 1472 |
| LMArena Japanese | 1379 | — |

## Instruction Following

- Grok 4.3: 72.1 (#140)
- Muse Spark: 75.9 (#51)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1366 | 1442 |

## Long Context

- Grok 4.3: 42.5 (#123)
- Muse Spark: 44.4 (#69)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1393 | 1451 |

## Writing & Preference

- Grok 4.3: 58.5 (#118)
- Muse Spark: 66.0 (#39)

| Benchmark | Grok 4.3 | Muse Spark |
|---|---|---|
| LMArena Text | 1397 | 1474 |
| LMArena Creative Writing | 1380 | 1459 |
| LMArena Multi-Turn | 1406 | 1477 |
| EQ-Bench 4 | 1075 | — |

## FAQ

### Is Grok 4.3 better than Muse Spark?

Muse Spark is the stronger model overall, scoring 50.6 to 43.8 on the Noometry Index.

### Is Grok 4.3 or Muse Spark better for coding?

Muse Spark scores higher on coding benchmarks: 46.2 versus 41.6 in the Noometry coding category.

### How many benchmarks do Grok 4.3 and Muse Spark share?

23 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Muse Spark has 27.