Model comparison
Mistral Small 3.1 vs Step 3.7 Flash
Step 3.7 Flash is the stronger model overall, scoring 36.5 to 31.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
Mistral AI
StepFunSummary
- The widest gap is in math, where Step 3.7 Flash leads 40.9 to 13.7.
- Both cost about the same: $0.35 input and $0.56 output per million tokens.
- Step 3.7 Flash accepts more context: 256K tokens versus 128K.
Side by side
| Mistral Small 3.1 | Step 3.7 Flash | |
|---|---|---|
| Provider | Mistral AI | StepFun |
| Noometry Index | 31.4 | 36.5 |
| Released | 2025-03-17 | 2026-05-29 |
| Weights | Open | Open |
| Context window | 128K | 256K |
| Max output | 102K | 256K |
| Input $ / M tokens | $0.35 | $0.18 |
| Output $ / M tokens | $0.56 | $1.11 |
| Results tracked | 28 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Mistral Small 3.1: 37.7 (#175), Step 3.7 Flash: 39.4 (#147)
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| LMArena Coding | 1309 | — |
| ALE-Bench | — | 694.12 |
Reasoning Step 3.7 Flash leads
Mistral Small 3.1: 18.9 (#249), Step 3.7 Flash: 20.9 (#211)
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | — | 39.7% |
| CritPt | — | 2.3% |
| Chess Puzzles | 1% | — |
| LMArena Hard Prompts | 1278 | — |
| Epoch Capabilities Index | 127.48 | — |
Math Step 3.7 Flash leads
Mistral Small 3.1: 13.7 (#295), Step 3.7 Flash: 40.9 (#74)
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| OTIS Mock AIME 2024-2025 | 3.9% | — |
| Omni-MATH | 24.8% | — |
| LMArena Math | 1261 | — |
Knowledge Not comparable
Mistral Small 3.1: 22.6 (#266), Step 3.7 Flash: —
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| GPQA Diamond | 41.9% | — |
| MMLU-Pro | 61% | — |
| GPQA (HELM) | 39.2% | — |
| LMArena Expert | 1258 | — |
Multimodal Not comparable
Mistral Small 3.1: 32.6 (#93), Step 3.7 Flash: —
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Vision | 1136 | — |
Multilingual Not comparable
Mistral Small 3.1: 41.4 (#204), Step 3.7 Flash: —
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1255 | — |
| LMArena Chinese | 1254 | — |
| LMArena French | 1270 | — |
| LMArena German | 1266 | — |
| LMArena Japanese | 1210 | — |
| LMArena Korean | 1206 | — |
| LMArena Russian | 1263 | — |
| LMArena Spanish | 1283 | — |
Instruction Following Not comparable
Mistral Small 3.1: 63.8 (#225), Step 3.7 Flash: —
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| IFEval | 75% | — |
| LMArena Instruction Following | 1264 | — |
Long Context Not comparable
Mistral Small 3.1: 39.5 (#172), Step 3.7 Flash: —
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1300 | — |
Writing & Preference Not comparable
Mistral Small 3.1: 37.2 (#254), Step 3.7 Flash: —
| Benchmark | Mistral Small 3.1 | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1278 | — |
| LMArena Creative Writing | 1253 | — |
| EQ-Bench Creative Writing | 761 | — |
| WildBench | 78.8% | — |
| LMArena Multi-Turn | 1270 | — |
Frequently asked questions
Is Mistral Small 3.1 better than Step 3.7 Flash?
Step 3.7 Flash is the stronger model overall, scoring 36.5 to 31.4 on the Noometry Index.
Which is cheaper, Mistral Small 3.1 or Step 3.7 Flash?
Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; Step 3.7 Flash lists at $0.18 and $1.11.
Is Mistral Small 3.1 or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 39.4 versus 37.7 in the Noometry coding category.
Which has the bigger context window?
Step 3.7 Flash does, with 256K tokens against 128K.
How many benchmarks do Mistral Small 3.1 and Step 3.7 Flash share?
0 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and Step 3.7 Flash has 5.