# Grok 4.20 Multi-Agent vs Mistral Medium 3.5

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 39.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-mistral-medium-3-5
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 9 categories and Mistral Medium 3.5 in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 42.4 to 16.6.
- The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 12.9% for Mistral Medium 3.5.
- Grok 4.20 Multi-Agent is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 262K.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 45.5 | 39.6 |
| Rank | 62 | 151 |
| Context | 1M | 262K |
| Input $/M | $1.25 | $1.50 |
| Output $/M | $2.50 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 42.4 (#91)
- Mistral Medium 3.5: 35.7 (#208)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Coding | 1458 | 1461 |
| LMArena WebDev | — | 1263 |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Mistral Medium 3.5: —

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 42.4 (#44)
- Mistral Medium 3.5: 16.6 (#290)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| NYT Connections (extended) | 89.6% | 12.9% |
| LMArena Hard Prompts | 1448 | 1436 |
| Kagi LLM Benchmark | — | 41.4% |
| Epoch Capabilities Index | — | 141.42 |

## Math

- Grok 4.20 Multi-Agent: 36.6 (#106)
- Mistral Medium 3.5: 36.4 (#113)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | 1441 | 1432 |

## Knowledge

- Grok 4.20 Multi-Agent: 39.7 (#116)
- Mistral Medium 3.5: 39.3 (#123)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | 1445 | 1431 |

## Multimodal

- Grok 4.20 Multi-Agent: 39.8 (#44)
- Mistral Medium 3.5: 37.6 (#64)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | 1259 | 1222 |

## Multilingual

- Grok 4.20 Multi-Agent: 54.6 (#40)
- Mistral Medium 3.5: 52.1 (#93)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | 1440 | 1405 |
| LMArena Chinese | 1475 | 1443 |
| LMArena French | 1467 | 1448 |
| LMArena German | 1456 | 1453 |
| LMArena Korean | 1416 | 1387 |
| LMArena Russian | 1457 | 1396 |
| LMArena Spanish | 1447 | 1406 |
| LMArena Japanese | 1405 | — |

## Instruction Following

- Grok 4.20 Multi-Agent: 75.0 (#80)
- Mistral Medium 3.5: 74.7 (#87)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1414 |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#84)
- Mistral Medium 3.5: 43.2 (#101)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | 1430 | 1414 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.1 (#57)
- Mistral Medium 3.5: 58.6 (#113)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | 1450 | 1421 |
| LMArena Creative Writing | 1435 | 1372 |
| LMArena Multi-Turn | 1451 | 1423 |
| EQ-Bench 4 | — | 993 |

## FAQ

### Is Grok 4.20 Multi-Agent better than Mistral Medium 3.5?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 39.6 on the Noometry Index.

### Which is cheaper, Grok 4.20 Multi-Agent or Mistral Medium 3.5?

Grok 4.20 Multi-Agent is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; Mistral Medium 3.5 lists at $1.50 and $7.50.

### Is Grok 4.20 Multi-Agent or Mistral Medium 3.5 better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 35.7 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 262K.

### How many benchmarks do Grok 4.20 Multi-Agent and Mistral Medium 3.5 share?

18 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Mistral Medium 3.5 has 22.