Model comparison
GPT-5.4 Pro vs Mistral Medium 3.5
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 40.2 on the Noometry Index. Mistral Medium 3.5 costs 23× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
Mistral AISummary
- They share 1 benchmark with published results for both. GPT-5.4 Pro scores higher in 4 categories and Mistral Medium 3.5 in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.4 Pro leads 70.7 to 17.3.
- Mistral Medium 3.5 is cheaper at $1.50 / $7.50 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 262K.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 Pro | Mistral Medium 3.5 | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 58.9 | 40.2 |
| Released | 2026-03-05 | — |
| Weights | Proprietary | Open |
| Context window | 1.05M | 262K |
| Max output | 128K | 210K |
| Input $ / M tokens | $30 | $1.50 |
| Output $ / M tokens | $180 | $7.50 |
| Results tracked | 16 | 22 |
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Category by category
Coding GPT-5.4 Pro leads
GPT-5.4 Pro: 43.2 (#90), Mistral Medium 3.5: 36.0 (#213)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| LMArena WebDev | — | 1264 |
| WeirdML | 57.4% | — |
| LMArena Coding | — | 1461 |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 70.7 (#13), Mistral Medium 3.5: 17.3 (#295)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| Epoch Capabilities Index | 158.93 | 141.35 |
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| Kagi LLM Benchmark | — | 41.4% |
| NYT Connections (extended) | — | 12.9% |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 58.6% | — |
| EnigmaEval | 23.8% | — |
| LMArena Hard Prompts | — | 1436 |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.4 (#22), Mistral Medium 3.5: 39.1 (#113)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| LMArena Math | — | 1431 |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#7), Mistral Medium 3.5: 40.0 (#126)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| GPQA Diamond | 94.6% | — |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1432 |
Multimodal Not comparable
GPT-5.4 Pro: —, Mistral Medium 3.5: 38.3 (#65)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | — | 1223 |
Multilingual Not comparable
GPT-5.4 Pro: —, Mistral Medium 3.5: 51.9 (#100)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | — | 1404 |
| LMArena Chinese | — | 1442 |
| LMArena French | — | 1448 |
| LMArena German | — | 1451 |
| LMArena Korean | — | 1385 |
| LMArena Russian | — | 1395 |
| LMArena Spanish | — | 1409 |
Instruction Following Not comparable
GPT-5.4 Pro: —, Mistral Medium 3.5: 74.6 (#90)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | — | 1415 |
Long Context Not comparable
GPT-5.4 Pro: —, Mistral Medium 3.5: 43.2 (#103)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | — | 1415 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, Mistral Medium 3.5: 58.5 (#117)
| Benchmark | GPT-5.4 Pro | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | — | 1421 |
| LMArena Creative Writing | — | 1374 |
| EQ-Bench 4 | — | 993 |
| LMArena Multi-Turn | — | 1423 |
Frequently asked questions
Is GPT-5.4 Pro better than Mistral Medium 3.5?
GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 40.2 on the Noometry Index. Mistral Medium 3.5 costs 23× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.4 Pro or Mistral Medium 3.5?
Mistral Medium 3.5 is cheaper. It lists at $1.50 per million input tokens and $7.50 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is GPT-5.4 Pro or Mistral Medium 3.5 better for coding?
GPT-5.4 Pro scores higher on coding benchmarks: 43.2 versus 36.0 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 262K.
How many benchmarks do GPT-5.4 Pro and Mistral Medium 3.5 share?
1 benchmark has published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Mistral Medium 3.5 has 22.