Model comparison
Grok 4.5 vs Mistral Medium 3.1
Grok 4.5 is the stronger model overall, scoring 55.0 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 3.8× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.
Last verified . 2 shared benchmarks.
Mistral AISummary
- They share 2 benchmarks with published results for both. Grok 4.5 scores higher in 2 categories and Mistral Medium 3.1 in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 10.6.
- The biggest single-benchmark swing is NYT Connections (extended): 79.9% for Grok 4.5 and 6.5% for Mistral Medium 3.1.
- Mistral Medium 3.1 is cheaper at $0.40 / $2 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 131K.
Side by side
| Grok 4.5 | Mistral Medium 3.1 | |
|---|---|---|
| Provider | xAI | Mistral AI |
| Noometry Index | 55.0 | 31.9 |
| Released | 2026-07-08 | — |
| Weights | Proprietary | Proprietary |
| Context window | 500K | 131K |
| Max output | 500K | 105K |
| Input $ / M tokens | $2 | $0.40 |
| Output $ / M tokens | $6 | $2 |
| Results tracked | 52 | 3 |
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Category by category
Coding Not comparable
Grok 4.5: 52.2 (#35), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| DeepSWE | 53.8% | — |
| FrontierCode | 42.4% | — |
| LMArena WebDev | 1553 | — |
| SciCode | 54.1% | — |
| WeirdML | 46.4% | — |
| LMArena Coding | 1474 | — |
| ALE-Bench | 1,309 | — |
Agentic & Tool Use Not comparable
Grok 4.5: 44.4 (#17), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| APEX-Agents | 56.2% | — |
| τ²-bench Banking | 47.9% | — |
| PostTrainBench | 23.4% | — |
| GBAEval | 65.4% | — |
| GDP.pdf | 14% | — |
| LMArena Search | 1213 | — |
| Vending-Bench 2 | 3,887 | — |
Reasoning Grok 4.5 leads
Grok 4.5: 56.1 (#25), Mistral Medium 3.1: 10.6 (#341)
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| NYT Connections (extended) | 79.9% | 6.5% |
| ARC-AGI-2 | 52.6% | — |
| SimpleBench | 70% | — |
| Kagi LLM Benchmark | 83.5% | — |
| ARC-AGI-1 | 87.2% | — |
| CritPt | 15.4% | — |
| Chess Puzzles | 36% | — |
| Thematic Generalization | — | 20.3% |
| LMArena Hard Prompts | 1462 | — |
| DTBench | 96.5% | — |
| LMCA | 45.2% | — |
| Surface Evolver Bench | 74.4% | — |
| Epoch Capabilities Index | 153.92 | — |
Math Not comparable
Grok 4.5: 60.9 (#35), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 57.2% | — |
| FrontierMath Tier 4 | 24.4% | — |
| OTIS Mock AIME 2024-2025 | 97.8% | — |
| ProofBench | 31% | — |
| LMArena Math | 1459 | — |
Knowledge Not comparable
Grok 4.5: 62.3 (#24), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| GPQA Diamond | 93.4% | — |
| SimpleQA Verified | 48.3% | — |
| LMArena Expert | 1466 | — |
Multimodal Not comparable
Grok 4.5: 37.6 (#72), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |
Multilingual Not comparable
Grok 4.5: 54.4 (#42), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Non-English | 1440 | — |
| LMArena Chinese | 1496 | — |
| LMArena French | 1456 | — |
| LMArena German | 1446 | — |
| LMArena Japanese | 1428 | — |
| LMArena Korean | 1404 | — |
| LMArena Russian | 1448 | — |
| LMArena Spanish | 1450 | — |
Instruction Following Not comparable
Grok 4.5: 76.0 (#48), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Instruction Following | 1446 | — |
Long Context Not comparable
Grok 4.5: 44.8 (#56), Mistral Medium 3.1: —
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| LMArena Longer Query | 1463 | — |
Writing & Preference Grok 4.5 leads
Grok 4.5: 65.8 (#42), Mistral Medium 3.1: 55.5 (#145)
| Benchmark | Grok 4.5 | Mistral Medium 3.1 |
|---|---|---|
| EQ-Bench Creative Writing | 1579 | 1476 |
| LMArena Text | 1448 | — |
| LMArena Creative Writing | 1442 | — |
| LMArena Multi-Turn | 1456 | — |
Frequently asked questions
Is Grok 4.5 better than Mistral Medium 3.1?
Grok 4.5 is the stronger model overall, scoring 55.0 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 3.8× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.
Which is cheaper, Grok 4.5 or Mistral Medium 3.1?
Mistral Medium 3.1 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; Grok 4.5 lists at $2 and $6.
Which has the bigger context window?
Grok 4.5 does, with 500K tokens against 131K.
How many benchmarks do Grok 4.5 and Mistral Medium 3.1 share?
2 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Mistral Medium 3.1 has 3.