Model comparison
Grok 4.20 Multi-Agent vs Muse Spark
Muse Spark is the stronger model overall, scoring 50.6 to 46.2 on the Noometry Index.
Last verified . 17 shared benchmarks.
MetaSummary
- They share 17 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 1 category and Muse Spark in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Muse Spark leads 65.7 to 40.4.
Side by side
| Grok 4.20 Multi-Agent | Muse Spark | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 46.2 | 50.6 |
| Released | 2026-03-09 | 2026-04-08 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 30K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 20 | 27 |
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Category by category
Coding Muse Spark leads
Grok 4.20 Multi-Agent: 43.0 (#92), Muse Spark: 46.2 (#69)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Coding | 1457 | 1481 |
| SciCode | — | 51.5% |
Agentic & Tool Use Not comparable
Grok 4.20 Multi-Agent: —, Muse Spark: —
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Search | 1204 | — |
Reasoning Grok 4.20 Multi-Agent leads
Grok 4.20 Multi-Agent: 43.9 (#48), Muse Spark: 35.9 (#67)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Hard Prompts | 1448 | 1474 |
| NYT Connections (extended) | 89.6% | — |
| CritPt | — | 11.3% |
| Epoch Capabilities Index | — | 152.04 |
Math Muse Spark leads
Grok 4.20 Multi-Agent: 39.4 (#104), Muse Spark: 47.8 (#66)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Math | 1442 | 1455 |
| OTIS Mock AIME 2024-2025 | — | 88.9% |
| ProofBench | — | 17% |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge Muse Spark leads
Grok 4.20 Multi-Agent: 40.4 (#119), Muse Spark: 65.7 (#13)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Expert | 1445 | 1457 |
| GPQA Diamond | — | 89.8% |
| Humanity's Last Exam | — | 40.6% |
Multimodal Muse Spark leads
Grok 4.20 Multi-Agent: 40.5 (#48), Muse Spark: 43.4 (#24)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Vision | 1259 | 1306 |
| LMArena Document | — | 1444 |
Multilingual Muse Spark leads
Grok 4.20 Multi-Agent: 54.4 (#43), Muse Spark: 56.1 (#24)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Non-English | 1440 | 1464 |
| LMArena Chinese | 1475 | 1509 |
| LMArena French | 1466 | 1497 |
| LMArena German | 1456 | 1497 |
| LMArena Korean | 1416 | 1459 |
| LMArena Russian | 1457 | 1466 |
| LMArena Spanish | 1447 | 1472 |
| LMArena Japanese | 1405 | — |
Instruction Following Muse Spark leads
Grok 4.20 Multi-Agent: 74.8 (#84), Muse Spark: 75.9 (#51)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1420 | 1442 |
Long Context Too close to call
Grok 4.20 Multi-Agent: 43.7 (#88), Muse Spark: 44.4 (#69)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1431 | 1451 |
Writing & Preference Muse Spark leads
Grok 4.20 Multi-Agent: 64.0 (#59), Muse Spark: 66.0 (#39)
| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Text | 1450 | 1474 |
| LMArena Creative Writing | 1436 | 1459 |
| LMArena Multi-Turn | 1452 | 1477 |
Frequently asked questions
Is Grok 4.20 Multi-Agent better than Muse Spark?
Muse Spark is the stronger model overall, scoring 50.6 to 46.2 on the Noometry Index.
Is Grok 4.20 Multi-Agent or Muse Spark better for coding?
Muse Spark scores higher on coding benchmarks: 46.2 versus 43.0 in the Noometry coding category.
How many benchmarks do Grok 4.20 Multi-Agent and Muse Spark share?
17 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Muse Spark has 27.