Model comparison
Mistral Medium 3.5 vs Step 3.7 Flash
Mistral Medium 3.5 is the stronger model overall, scoring 40.2 to 37.3 on the Noometry Index. Step 3.7 Flash costs 7.2× less per token, which makes it the better buy when Mistral Medium 3.5's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
Mistral AI
StepFunSummary
- They share 1 benchmark with published results for both. Mistral Medium 3.5 scores higher in 0 categories and Step 3.7 Flash in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 3.7 Flash leads 21.6 to 17.3.
- The biggest single-benchmark swing is NYT Connections (extended): 12.9% for Mistral Medium 3.5 and 39.7% for Step 3.7 Flash.
- Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $1.50 / $7.50 for Mistral Medium 3.5.
- Mistral Medium 3.5 accepts more context: 262K tokens versus 256K.
Side by side
| Mistral Medium 3.5 | Step 3.7 Flash | |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 40.2 | 37.3 |
| Released | — | 2026-05-29 |
| Weights | Open | Open |
| Context window | 262K | 256K |
| Max output | 210K | 256K |
| Input $ / M tokens | $1.50 | $0.18 |
| Output $ / M tokens | $7.50 | $1.11 |
| Results tracked | 22 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Mistral Medium 3.5: 36.0 (#213), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| LMArena WebDev | 1264 | — |
| SciCode | — | 40% |
| LMArena Coding | 1461 | — |
| ALE-Bench | — | 694.12 |
Reasoning Step 3.7 Flash leads
Mistral Medium 3.5: 17.3 (#295), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | 12.9% | 39.7% |
| Kagi LLM Benchmark | 41.4% | — |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1436 | — |
| Epoch Capabilities Index | 141.35 | — |
Math Step 3.7 Flash leads
Mistral Medium 3.5: 39.1 (#113), Step 3.7 Flash: 42.9 (#82)
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| LMArena Math | 1431 | — |
Knowledge Not comparable
Mistral Medium 3.5: 40.0 (#126), Step 3.7 Flash: —
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| LMArena Expert | 1432 | — |
Multimodal Not comparable
Mistral Medium 3.5: 38.3 (#65), Step 3.7 Flash: —
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| LMArena Vision | 1223 | — |
Multilingual Not comparable
Mistral Medium 3.5: 51.9 (#100), Step 3.7 Flash: —
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| 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
Mistral Medium 3.5: 74.6 (#90), Step 3.7 Flash: —
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1415 | — |
Long Context Not comparable
Mistral Medium 3.5: 43.2 (#103), Step 3.7 Flash: —
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1415 | — |
Writing & Preference Not comparable
Mistral Medium 3.5: 58.5 (#117), Step 3.7 Flash: —
| Benchmark | Mistral Medium 3.5 | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1421 | — |
| LMArena Creative Writing | 1374 | — |
| EQ-Bench 4 | 993 | — |
| LMArena Multi-Turn | 1423 | — |
Frequently asked questions
Is Mistral Medium 3.5 better than Step 3.7 Flash?
Mistral Medium 3.5 is the stronger model overall, scoring 40.2 to 37.3 on the Noometry Index. Step 3.7 Flash costs 7.2× less per token, which makes it the better buy when Mistral Medium 3.5's lead doesn't matter for your workload.
Which is cheaper, Mistral Medium 3.5 or Step 3.7 Flash?
Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; Mistral Medium 3.5 lists at $1.50 and $7.50.
Is Mistral Medium 3.5 or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 36.0 in the Noometry coding category.
Which has the bigger context window?
Mistral Medium 3.5 does, with 262K tokens against 256K.
How many benchmarks do Mistral Medium 3.5 and Step 3.7 Flash share?
1 benchmark has published results for both models. Mistral Medium 3.5 has 22 scored results on Noometry and Step 3.7 Flash has 5.