# Grok 4.3 vs Muse Spark 1.3

> Muse Spark 1.3 is the stronger model overall, scoring 54.4 to 43.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-muse-spark-1-3
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Grok 4.3 scores higher in 1 category and Muse Spark 1.3 in 9 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Spark 1.3 leads 72.4 to 45.8.
- The biggest single-benchmark swing is FrontierMath Tier 4: 14.6% for Grok 4.3 and 46.3% for Muse Spark 1.3.
- Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.3.
- Muse Spark 1.3 accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 43.6 | 54.4 |
| Rank | 80 | 27 |
| Context | 1M | 1.05M |
| Input $/M | $1.25 | $1.25 |
| Output $/M | $2.50 | $4.25 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.3: 41.3 (#117)
- Muse Spark 1.3: 56.1 (#18)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena WebDev | 1357 | 1655 |
| SciCode | 47.3% | 59.7% |
| LMArena Coding | 1415 | 1516 |
| CursorBench | — | 41.6% |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |

## Agentic & Tool Use

- Grok 4.3: 27.6 (#93)
- Muse Spark 1.3: 38.6 (#28)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| GDP.pdf | 8% | 27.6% |
| APEX-Agents | — | 57.8% |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |

## Reasoning

- Grok 4.3: 34.9 (#60)
- Muse Spark 1.3: 52.9 (#27)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| NYT Connections (extended) | 55.2% | 85.1% |
| CritPt | 8% | 24.9% |
| Chess Puzzles | 25% | 38% |
| LMArena Hard Prompts | 1397 | 1503 |
| DTBench | 90.7% | 96.5% |
| LMCA | 38.3% | 53.9% |
| Epoch Capabilities Index | 149.13 | 156.89 |
| Mystery Game Puzzles | — | 25% |
| Bench to the Future 3 | — | 0.14 |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 45.8 (#60)
- Muse Spark 1.3: 72.4 (#16)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 42.8% | 74.4% |
| FrontierMath Tier 4 | 14.6% | 46.3% |
| OTIS Mock AIME 2024-2025 | 93.3% | 99.2% |
| LMArena Math | 1388 | 1497 |
| ProofBench | 11% | — |

## Knowledge

- Grok 4.3: 52.5 (#57)
- Muse Spark 1.3: 42.0 (#92)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena Expert | 1385 | 1516 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#96)
- Muse Spark 1.3: 43.0 (#21)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena Vision | 1231 | 1310 |
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | — | 1471 |

## Multilingual

- Grok 4.3: 50.7 (#114)
- Muse Spark 1.3: 57.8 (#6)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena Non-English | 1385 | 1485 |
| LMArena Chinese | 1423 | 1527 |
| LMArena French | 1412 | 1534 |
| LMArena Korean | 1357 | 1513 |
| LMArena Russian | 1399 | 1491 |
| LMArena Spanish | 1402 | 1485 |
| LMArena German | 1395 | — |
| LMArena Japanese | 1379 | — |

## Instruction Following

- Grok 4.3: 72.3 (#135)
- Muse Spark 1.3: 77.8 (#14)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena Instruction Following | 1366 | 1481 |

## Long Context

- Grok 4.3: 42.5 (#118)
- Muse Spark 1.3: 45.7 (#29)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena Longer Query | 1393 | 1491 |

## Writing & Preference

- Grok 4.3: 58.6 (#112)
- Muse Spark 1.3: 73.7 (#10)

| Benchmark | Grok 4.3 | Muse Spark 1.3 |
|---|---|---|
| LMArena Text | 1397 | 1490 |
| LMArena Creative Writing | 1380 | 1450 |
| LMArena Multi-Turn | 1406 | 1486 |
| EQ-Bench Creative Writing | — | 1906 |
| EQ-Bench 4 | 1075 | — |

## FAQ

### Is Grok 4.3 better than Muse Spark 1.3?

Muse Spark 1.3 is the stronger model overall, scoring 54.4 to 43.6 on the Noometry Index.

### Which is cheaper, Grok 4.3 or Muse Spark 1.3?

Grok 4.3 is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Muse Spark 1.3 lists at $1.25 and $4.25.

### Is Grok 4.3 or Muse Spark 1.3 better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.1 versus 41.3 in the Noometry coding category.

### Which has the bigger context window?

Muse Spark 1.3 does, with 1.05M tokens against 1M.

### How many benchmarks do Grok 4.3 and Muse Spark 1.3 share?

28 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Muse Spark 1.3 has 34.