Model comparison
Mistral Medium 3.1 vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 47.9 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 1.8× less per token, which makes it the better buy when Step 5 Preview's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Mistral AI
StepFunSummary
- The widest gap is in reasoning, where Step 5 Preview leads 40.0 to 10.6.
- Mistral Medium 3.1 is cheaper at $0.40 / $2 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- Step 5 Preview accepts more context: 1.02M tokens versus 131K.
Side by side
| Mistral Medium 3.1 | Step 5 Preview | |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 31.9 | 47.9 |
| Released | — | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | 131K | 1.02M |
| Max output | 105K | 66K |
| Input $ / M tokens | $0.40 | $1 |
| Output $ / M tokens | $2 | $2.70 |
| Results tracked | 3 | 18 |
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Category by category
Coding Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 51.8 (#36)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1564 |
| SciCode | — | 58.9% |
| LMArena Coding | — | 1480 |
Reasoning Step 5 Preview leads
Mistral Medium 3.1: 10.6 (#341), Step 5 Preview: 40.0 (#57)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| NYT Connections (extended) | 6.5% | — |
| CritPt | — | 20.9% |
| Thematic Generalization | 20.3% | — |
| LMArena Hard Prompts | — | 1465 |
Math Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 46.1 (#72)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| ProofBench | — | 42% |
| LMArena Math | — | 1470 |
Knowledge Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 41.2 (#112)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena Expert | — | 1470 |
Multimodal Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 41.0 (#41)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |
Multilingual Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 53.8 (#54)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | — | 1432 |
| LMArena Chinese | — | 1519 |
| LMArena Russian | — | 1436 |
| LMArena Spanish | — | 1439 |
Instruction Following Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 76.0 (#50)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | — | 1444 |
Long Context Not comparable
Mistral Medium 3.1: —, Step 5 Preview: 44.5 (#64)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | — | 1455 |
Writing & Preference Step 5 Preview leads
Mistral Medium 3.1: 55.5 (#145), Step 5 Preview: 62.8 (#71)
| Benchmark | Mistral Medium 3.1 | Step 5 Preview |
|---|---|---|
| LMArena Text | — | 1442 |
| LMArena Creative Writing | — | 1410 |
| EQ-Bench Creative Writing | 1476 | — |
| LMArena Multi-Turn | — | 1447 |
Frequently asked questions
Is Mistral Medium 3.1 better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 47.9 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 1.8× less per token, which makes it the better buy when Step 5 Preview's lead doesn't matter for your workload.
Which is cheaper, Mistral Medium 3.1 or Step 5 Preview?
Mistral Medium 3.1 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; Step 5 Preview lists at $1 and $2.70.
Which has the bigger context window?
Step 5 Preview does, with 1.02M tokens against 131K.
How many benchmarks do Mistral Medium 3.1 and Step 5 Preview share?
0 benchmarks have published results for both models. Mistral Medium 3.1 has 3 scored results on Noometry and Step 5 Preview has 18.