Model comparison
Grok 4.3 vs Muse Glimmer
Grok 4.3 is the stronger model overall, scoring 43.6 to 41.3 on the Noometry Index.
Last verified . 13 shared benchmarks.
MetaSummary
- 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.
Side by side
| Grok 4.3 | Muse Glimmer | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 43.6 | 41.3 |
| Released | 2026-04-17 | — |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 30K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 40 | 13 |
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Category by category
Coding Grok 4.3 leads
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 Not comparable
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 leads
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 leads
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 leads
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 Not comparable
Grok 4.3: 31.6 (#96), Muse Glimmer: —
| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Vision | 1231 | — |
| Blueprint-Bench 2 | 0% | — |
Multilingual Too close to call
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 Too close to call
Grok 4.3: 72.3 (#135), Muse Glimmer: 72.7 (#134)
| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1366 | 1374 |
Long Context Too close to call
Grok 4.3: 42.5 (#118), Muse Glimmer: 42.1 (#124)
| Benchmark | Grok 4.3 | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1393 | 1381 |
Writing & Preference Too close to call
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 | — |
Frequently asked questions
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.