# Grok 4.3 vs Mistral Medium 3.5

> Grok 4.3 is the stronger model overall, scoring 43.6 to 39.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-mistral-medium-3-5
- Last updated: 2026-10-10
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Grok 4.3 scores higher in 5 categories and Mistral Medium 3.5 in 4 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.3 leads 34.9 to 16.6.
- The biggest single-benchmark swing is NYT Connections (extended): 55.2% for Grok 4.3 and 12.9% for Mistral Medium 3.5.
- Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
- Grok 4.3 accepts more context: 1M tokens versus 262K.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 43.6 | 39.6 |
| Rank | 80 | 151 |
| Context | 1M | 262K |
| Input $/M | $1.25 | $1.50 |
| Output $/M | $2.50 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.3: 41.3 (#117)
- Mistral Medium 3.5: 35.7 (#208)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena WebDev | 1357 | 1263 |
| LMArena Coding | 1415 | 1461 |
| SciCode | 47.3% | — |
| WeirdML | 49.9% | — |
| ALE-Bench | 944.17 | — |

## Agentic & Tool Use

- Grok 4.3: 27.6 (#93)
- Mistral Medium 3.5: —

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |

## Reasoning

- Grok 4.3: 34.9 (#60)
- Mistral Medium 3.5: 16.6 (#290)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| NYT Connections (extended) | 55.2% | 12.9% |
| LMArena Hard Prompts | 1397 | 1436 |
| Epoch Capabilities Index | 149.13 | 141.42 |
| Kagi LLM Benchmark | — | 41.4% |
| CritPt | 8% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 45.8 (#60)
- Mistral Medium 3.5: 36.4 (#113)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | 1388 | 1432 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 11% | — |

## Knowledge

- Grok 4.3: 52.5 (#57)
- Mistral Medium 3.5: 39.3 (#123)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | 1385 | 1431 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#96)
- Mistral Medium 3.5: 37.6 (#64)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | 1231 | 1222 |
| Blueprint-Bench 2 | 0% | — |

## Multilingual

- Grok 4.3: 50.7 (#114)
- Mistral Medium 3.5: 52.1 (#93)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | 1385 | 1405 |
| LMArena Chinese | 1423 | 1443 |
| LMArena French | 1412 | 1448 |
| LMArena German | 1395 | 1453 |
| LMArena Korean | 1357 | 1387 |
| LMArena Russian | 1399 | 1396 |
| LMArena Spanish | 1402 | 1406 |
| LMArena Japanese | 1379 | — |

## Instruction Following

- Grok 4.3: 72.3 (#135)
- Mistral Medium 3.5: 74.7 (#87)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | 1366 | 1414 |

## Long Context

- Grok 4.3: 42.5 (#118)
- Mistral Medium 3.5: 43.2 (#101)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | 1393 | 1414 |

## Writing & Preference

- Grok 4.3: 58.6 (#112)
- Mistral Medium 3.5: 58.6 (#113)

| Benchmark | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | 1397 | 1421 |
| LMArena Creative Writing | 1380 | 1372 |
| EQ-Bench 4 | 1075 | 993 |
| LMArena Multi-Turn | 1406 | 1423 |

## FAQ

### Is Grok 4.3 better than Mistral Medium 3.5?

Grok 4.3 is the stronger model overall, scoring 43.6 to 39.6 on the Noometry Index.

### Which is cheaper, Grok 4.3 or Mistral Medium 3.5?

Grok 4.3 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 4.3 or Mistral Medium 3.5 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.3 versus 35.7 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 262K.

### How many benchmarks do Grok 4.3 and Mistral Medium 3.5 share?

21 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and Mistral Medium 3.5 has 22.