# 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.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-muse-spark
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- 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.

## Snapshot

| | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 46.2 | 50.6 |
| Rank | 65 | 46 |
| Context | 1M | — |
| Input $/M | $1.25 | — |
| Output $/M | $2.50 | — |
| Weights | Proprietary | Proprietary |

## Coding

- 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

- Grok 4.20 Multi-Agent: —
- Muse Spark: —

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- 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

- 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

- 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

- 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

- 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

- 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

- 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

- 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 |

## FAQ

### 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.