# Grok 4.20 Multi-Agent vs Mistral Small 3.1

> Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 31.4 on the Noometry Index. Mistral Small 3.1 costs 3.9× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/grok-4-20-multi-agent-vs-mistral-small-3-1
- 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 Small 3.1 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.20 Multi-Agent leads 64.1 to 37.2.
- Mistral Small 3.1 is cheaper at $0.35 / $0.56 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 128K.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 45.5 | 31.4 |
| Rank | 62 | 263 |
| Context | 1M | 128K |
| Input $/M | $1.25 | $0.35 |
| Output $/M | $2.50 | $0.56 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.20 Multi-Agent: 42.4 (#91)
- Mistral Small 3.1: 37.7 (#175)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Coding | 1458 | 1309 |

## Agentic & Tool Use

- Grok 4.20 Multi-Agent: —
- Mistral Small 3.1: —

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Search | 1204 | — |

## Reasoning

- Grok 4.20 Multi-Agent: 42.4 (#44)
- Mistral Small 3.1: 18.9 (#249)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Hard Prompts | 1448 | 1278 |
| NYT Connections (extended) | 89.6% | — |
| Chess Puzzles | — | 1% |
| Epoch Capabilities Index | — | 127.48 |

## Math

- Grok 4.20 Multi-Agent: 36.6 (#106)
- Mistral Small 3.1: 13.7 (#295)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Math | 1441 | 1261 |
| OTIS Mock AIME 2024-2025 | — | 3.9% |
| Omni-MATH | — | 24.8% |

## Knowledge

- Grok 4.20 Multi-Agent: 39.7 (#116)
- Mistral Small 3.1: 22.6 (#266)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Expert | 1445 | 1258 |
| GPQA Diamond | — | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |

## Multimodal

- Grok 4.20 Multi-Agent: 39.8 (#44)
- Mistral Small 3.1: 32.6 (#93)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | 1259 | 1136 |

## Multilingual

- Grok 4.20 Multi-Agent: 54.6 (#40)
- Mistral Small 3.1: 41.4 (#204)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | 1440 | 1255 |
| LMArena Chinese | 1475 | 1254 |
| LMArena French | 1467 | 1270 |
| LMArena German | 1456 | 1266 |
| LMArena Japanese | 1405 | 1210 |
| LMArena Korean | 1416 | 1206 |
| LMArena Russian | 1457 | 1263 |
| LMArena Spanish | 1447 | 1283 |

## Instruction Following

- Grok 4.20 Multi-Agent: 75.0 (#80)
- Mistral Small 3.1: 63.8 (#225)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Instruction Following | 1420 | 1264 |
| IFEval | — | 75% |

## Long Context

- Grok 4.20 Multi-Agent: 43.7 (#84)
- Mistral Small 3.1: 39.5 (#172)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | 1430 | 1300 |

## Writing & Preference

- Grok 4.20 Multi-Agent: 64.1 (#57)
- Mistral Small 3.1: 37.2 (#254)

| Benchmark | Grok 4.20 Multi-Agent | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | 1450 | 1278 |
| LMArena Creative Writing | 1435 | 1253 |
| LMArena Multi-Turn | 1451 | 1270 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |

## FAQ

### Is Grok 4.20 Multi-Agent better than Mistral Small 3.1?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 31.4 on the Noometry Index. Mistral Small 3.1 costs 3.9× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

### Which is cheaper, Grok 4.20 Multi-Agent or Mistral Small 3.1?

Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

### Is Grok 4.20 Multi-Agent or Mistral Small 3.1 better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 37.7 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 128K.

### How many benchmarks do Grok 4.20 Multi-Agent and Mistral Small 3.1 share?

18 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Mistral Small 3.1 has 28.