Model comparison
Grok 4.20 Multi-Agent vs Muse Glimmer
Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 41.7 on the Noometry Index.
Last verified . 12 shared benchmarks.
MetaSummary
- They share 12 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 8 categories and Muse Glimmer in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 25.7.
- Muse Glimmer has downloadable open weights; the other is API-only.
Side by side
| Grok 4.20 Multi-Agent | Muse Glimmer | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 46.2 | 41.7 |
| Released | 2026-03-09 | 2026-08-10 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 30K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 20 | 15 |
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Category by category
Coding Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 43.0 (#92), Muse Glimmer: 40.4 (#142)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Coding | 1457 | 1416 |
| LMArena WebDev | — | 1355 |
| SciCode | — | 44.9% |
Agentic & Tool Use Not comparable
Grok 4.20 Multi-Agent: —, Muse Glimmer: —
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Search | 1204 | — |
Reasoning Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 43.9 (#48), Muse Glimmer: 25.7 (#144)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Hard Prompts | 1448 | 1396 |
| NYT Connections (extended) | 89.6% | — |
| CritPt | — | 2.6% |
Math Too close to call
Grok 4.20 Multi-Agent: 39.4 (#104), Muse Glimmer: 38.8 (#125)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Math | 1442 | 1417 |
Knowledge Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 40.4 (#119), Muse Glimmer: 38.5 (#143)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Expert | 1445 | 1386 |
Multimodal Not comparable
Grok 4.20 Multi-Agent: 40.5 (#48), Muse Glimmer: —
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Vision | 1259 | — |
Multilingual Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 54.4 (#43), Muse Glimmer: 50.5 (#122)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Non-English | 1440 | 1384 |
| LMArena Chinese | 1475 | 1412 |
| LMArena Russian | 1457 | 1390 |
| LMArena French | 1466 | — |
| LMArena German | 1456 | — |
| LMArena Japanese | 1405 | — |
| LMArena Korean | 1416 | — |
| LMArena Spanish | 1447 | — |
Instruction Following Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 74.8 (#84), Muse Glimmer: 72.6 (#135)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1420 | 1375 |
Long Context Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 43.7 (#88), Muse Glimmer: 42.1 (#129)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1431 | 1382 |
Writing & Preference Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 64.0 (#59), Muse Glimmer: 57.5 (#126)
| Benchmark | Grok 4.20 Multi-Agent | Muse Glimmer |
|---|---|---|
| LMArena Text | 1450 | 1389 |
| LMArena Creative Writing | 1436 | 1339 |
| LMArena Multi-Turn | 1452 | 1399 |
Frequently asked questions
Is Grok 4.20 Multi-Agent better than Muse Glimmer?
Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 41.7 on the Noometry Index.
Is Grok 4.20 Multi-Agent or Muse Glimmer better for coding?
Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 40.4 in the Noometry coding category.
How many benchmarks do Grok 4.20 Multi-Agent and Muse Glimmer share?
12 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Muse Glimmer has 15.