Model comparison
GPT-4.5 vs Mistral Medium 3.5
Mistral Medium 3.5 is the stronger model overall, scoring 40.2 to 37.2 on the Noometry Index.
Last verified . 17 shared benchmarks.
Mistral AISummary
- They share 17 benchmarks with published results for both. GPT-4.5 scores higher in 2 categories and Mistral Medium 3.5 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Mistral Medium 3.5 leads 40.0 to 32.5.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.
Side by side
| GPT-4.5 | Mistral Medium 3.5 | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 37.2 | 40.2 |
| Released | 2025-02-27 | — |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 210K |
| Input $ / M tokens | — | $1.50 |
| Output $ / M tokens | — | $7.50 |
| Results tracked | 42 | 22 |
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Category by category
Coding GPT-4.5 leads
GPT-4.5: 42.2 (#109), Mistral Medium 3.5: 36.0 (#213)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Coding | 1396 | 1461 |
| Aider Polyglot | 44.9% | — |
| LMArena WebDev | — | 1264 |
| WeirdML | 39.4% | — |
| LiveBench Coding | 75.2% | — |
Agentic & Tool Use Not comparable
GPT-4.5: 27.9 (#97), Mistral Medium 3.5: —
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| Cybench | 17.5% | — |
Reasoning Mistral Medium 3.5 leads
GPT-4.5: 13.9 (#330), Mistral Medium 3.5: 17.3 (#295)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Hard Prompts | 1403 | 1436 |
| Epoch Capabilities Index | 136.74 | 141.35 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| Kagi LLM Benchmark | — | 41.4% |
| NYT Connections (extended) | — | 12.9% |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| LiveBench Reasoning | 71.1% | — |
| LiveBench Data Analysis | 64.3% | — |
| ForecastBench | 61.7 | — |
| LiveBench | 69% | — |
Math Mistral Medium 3.5 leads
GPT-4.5: 32.6 (#211), Mistral Medium 3.5: 39.1 (#113)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | 1412 | 1431 |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| LiveBench Math | 69.3% | — |
| MATH Level 5 | 78.6% | — |
Knowledge Mistral Medium 3.5 leads
GPT-4.5: 32.5 (#211), Mistral Medium 3.5: 40.0 (#126)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | 1394 | 1432 |
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |
Multimodal Too close to call
GPT-4.5: 37.6 (#71), Mistral Medium 3.5: 38.3 (#65)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | 1195 | 1223 |
| VPCT | 45% | — |
Multilingual Too close to call
GPT-4.5: 52.5 (#83), Mistral Medium 3.5: 51.9 (#100)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | 1413 | 1404 |
| LMArena Chinese | 1421 | 1442 |
| LMArena French | 1418 | 1448 |
| LMArena German | 1457 | 1451 |
| LMArena Korean | 1392 | 1385 |
| LMArena Russian | 1419 | 1395 |
| LMArena Japanese | 1416 | — |
| LMArena Spanish | — | 1409 |
Instruction Following Mistral Medium 3.5 leads
GPT-4.5: 72.6 (#134), Mistral Medium 3.5: 74.6 (#90)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | 1404 | 1415 |
| LiveBench Instruction Following | 72.3% | — |
Long Context Mistral Medium 3.5 leads
GPT-4.5: 40.4 (#155), Mistral Medium 3.5: 43.2 (#103)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | 1406 | 1415 |
| Fiction.LiveBench | 63.9% | — |
Writing & Preference Mistral Medium 3.5 leads
GPT-4.5: 56.9 (#134), Mistral Medium 3.5: 58.5 (#117)
| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | 1417 | 1421 |
| LMArena Creative Writing | 1394 | 1374 |
| LMArena Multi-Turn | 1444 | 1423 |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |
| EQ-Bench 4 | — | 993 |
| LiveBench Language | 61.5% | — |
Frequently asked questions
Is GPT-4.5 better than Mistral Medium 3.5?
Mistral Medium 3.5 is the stronger model overall, scoring 40.2 to 37.2 on the Noometry Index.
Is GPT-4.5 or Mistral Medium 3.5 better for coding?
GPT-4.5 scores higher on coding benchmarks: 42.2 versus 36.0 in the Noometry coding category.
How many benchmarks do GPT-4.5 and Mistral Medium 3.5 share?
17 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Mistral Medium 3.5 has 22.