# Grok 4.20 Multi-Agent vs Muse Spark 1.3

> Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 46.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-muse-spark-1-3
- Last updated: 2026-10-12
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 0 categories and Muse Spark 1.3 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Spark 1.3 leads 73.1 to 39.4.
- Grok 4.20 Multi-Agent is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.25 / $4.25 for Muse Spark 1.3.
- Muse Spark 1.3 accepts more context: 1.05M tokens versus 1M.

## Snapshot

| | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 46.2 | 54.8 |
| Rank | 65 | 27 |
| Context | 1M | 1.05M |
| Input $/M | $1.25 | $1.25 |
| Output $/M | $2.50 | $4.25 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.20 Multi-Agent: 43.0 (#92)
- Muse Spark 1.3: 56.6 (#21)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Coding | 1457 | 1514 |
| CursorBench | — | 41.6% |
| LMArena WebDev | — | 1657 |
| SciCode | — | 59.7% |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Muse Spark 1.3: 38.6 (#30)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| APEX-Agents | — | 57.8% |
| GDP.pdf | — | 27.6% |
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 43.9 (#48)
- Muse Spark 1.3: 54.0 (#27)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| NYT Connections (extended) | 89.6% | 85.1% |
| LMArena Hard Prompts | 1448 | 1503 |
| CritPt | — | 26% |
| Chess Puzzles | — | 38% |
| Mystery Game Puzzles | — | 25% |
| DTBench | — | 96.5% |
| LMCA | — | 53.9% |
| Bench to the Future 3 | — | 0.14 |
| Epoch Capabilities Index | — | 156.75 |

## Math

- Grok 4.20 Multi-Agent: 39.4 (#104)
- Muse Spark 1.3: 73.1 (#21)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Math | 1442 | 1494 |
| FrontierMath (Tiers 1-3) | — | 74.4% |
| FrontierMath Tier 4 | — | 46.3% |
| OTIS Mock AIME 2024-2025 | — | 99.2% |
| ProofBench | — | 58% |

## Knowledge

- Grok 4.20 Multi-Agent: 40.4 (#119)
- Muse Spark 1.3: 42.6 (#95)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Expert | 1445 | 1516 |

## Multimodal

- Grok 4.20 Multi-Agent: 40.5 (#48)
- Muse Spark 1.3: 43.7 (#22)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Vision | 1259 | 1309 |
| LMArena Document | — | 1471 |

## Multilingual

- Grok 4.20 Multi-Agent: 54.4 (#43)
- Muse Spark 1.3: 57.4 (#8)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Non-English | 1440 | 1481 |
| LMArena Chinese | 1475 | 1529 |
| LMArena French | 1466 | 1524 |
| LMArena German | 1456 | 1515 |
| LMArena Japanese | 1405 | 1474 |
| LMArena Korean | 1416 | 1501 |
| LMArena Russian | 1457 | 1490 |
| LMArena Spanish | 1447 | 1490 |

## Instruction Following

- Grok 4.20 Multi-Agent: 74.8 (#84)
- Muse Spark 1.3: 77.5 (#22)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1477 |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#88)
- Muse Spark 1.3: 45.6 (#32)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Longer Query | 1431 | 1488 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.0 (#59)
- Muse Spark 1.3: 73.6 (#9)

| Benchmark | Grok 4.20 Multi-Agent | Muse Spark 1.3 |
|---|---|---|
| LMArena Text | 1450 | 1490 |
| LMArena Creative Writing | 1436 | 1455 |
| LMArena Multi-Turn | 1452 | 1482 |
| EQ-Bench Creative Writing | — | 1906 |

## FAQ

### Is Grok 4.20 Multi-Agent better than Muse Spark 1.3?

Muse Spark 1.3 is the stronger model overall, scoring 54.8 to 46.2 on the Noometry Index.

### Which is cheaper, Grok 4.20 Multi-Agent or Muse Spark 1.3?

Grok 4.20 Multi-Agent is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Muse Spark 1.3 lists at $1.25 and $4.25.

### Is Grok 4.20 Multi-Agent or Muse Spark 1.3 better for coding?

Muse Spark 1.3 scores higher on coding benchmarks: 56.6 versus 43.0 in the Noometry coding category.

### Which has the bigger context window?

Muse Spark 1.3 does, with 1.05M tokens against 1M.

### How many benchmarks do Grok 4.20 Multi-Agent and Muse Spark 1.3 share?

19 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Muse Spark 1.3 has 37.