# Grok 4.3 vs Muse Glimmer

> Grok 4.3 is the stronger model overall, scoring 43.6 to 41.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-muse-glimmer
- Last updated: 2026-10-10
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Grok 4.3 scores higher in 7 categories and Muse Glimmer in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 37.9.
- Muse Glimmer has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.3 | Muse Glimmer |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 43.6 | 41.3 |
| Rank | 80 | 128 |
| Context | 1M | — |
| Input $/M | $1.25 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4.3: 41.3 (#117)
- Muse Glimmer: 38.7 (#157)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena WebDev | 1357 | 1355 |
| LMArena Coding | 1415 | 1417 |
| SciCode | 47.3% | — |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |

## Agentic & Tool Use

- Grok 4.3: 27.6 (#93)
- Muse Glimmer: —

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

## Reasoning

- Grok 4.3: 34.9 (#60)
- Muse Glimmer: 27.2 (#111)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Hard Prompts | 1397 | 1395 |
| NYT Connections (extended) | 55.2% | — |
| CritPt | 8% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| Epoch Capabilities Index | 149.13 | — |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 45.8 (#60)
- Muse Glimmer: 36.1 (#128)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Math | 1388 | 1419 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 11% | — |

## Knowledge

- Grok 4.3: 52.5 (#57)
- Muse Glimmer: 37.9 (#140)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Expert | 1385 | 1388 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#96)
- Muse Glimmer: —

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Vision | 1231 | — |
| Blueprint-Bench 2 | 0% | — |

## Multilingual

- Grok 4.3: 50.7 (#114)
- Muse Glimmer: 50.6 (#117)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Non-English | 1385 | 1384 |
| LMArena Chinese | 1423 | 1412 |
| LMArena Russian | 1399 | 1393 |
| LMArena French | 1412 | — |
| LMArena German | 1395 | — |
| LMArena Japanese | 1379 | — |
| LMArena Korean | 1357 | — |
| LMArena Spanish | 1402 | — |

## Instruction Following

- Grok 4.3: 72.3 (#135)
- Muse Glimmer: 72.7 (#134)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1366 | 1374 |

## Long Context

- Grok 4.3: 42.5 (#118)
- Muse Glimmer: 42.1 (#124)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1393 | 1381 |

## Writing & Preference

- Grok 4.3: 58.6 (#112)
- Muse Glimmer: 57.7 (#122)

| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Text | 1397 | 1389 |
| LMArena Creative Writing | 1380 | 1338 |
| LMArena Multi-Turn | 1406 | 1398 |
| EQ-Bench 4 | 1075 | — |

## FAQ

### Is Grok 4.3 better than Muse Glimmer?

Grok 4.3 is the stronger model overall, scoring 43.6 to 41.3 on the Noometry Index.

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

Grok 4.3 scores higher on coding benchmarks: 41.3 versus 38.7 in the Noometry coding category.

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

13 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Muse Glimmer has 13.