Model comparison
Step 2 16k Exp 202412 vs Step 3.7 Flash
Step 2 16k Exp 202412 is the stronger model overall, scoring 39.2 to 37.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in math, where Step 3.7 Flash leads 42.9 to 36.3.
- Step 3.7 Flash has downloadable open weights; the other is API-only.
Side by side
| Step 2 16k Exp 202412 | Step 3.7 Flash | |
|---|---|---|
| Provider | StepFun | StepFun |
| Noometry Index | 39.2 | 37.3 |
| Released | — | 2026-05-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.18 |
| Output $ / M tokens | — | $1.11 |
| Results tracked | 12 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Step 2 16k Exp 202412: 38.5 (#174), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| LMArena Coding | 1316 | — |
| ALE-Bench | — | 694.12 |
Reasoning Step 2 16k Exp 202412 leads
Step 2 16k Exp 202412: 25.9 (#142), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | — | 39.7% |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1299 | — |
Math Step 3.7 Flash leads
Step 2 16k Exp 202412: 36.3 (#169), Step 3.7 Flash: 42.9 (#82)
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| LMArena Math | 1304 | — |
Knowledge Not comparable
Step 2 16k Exp 202412: 35.2 (#187), Step 3.7 Flash: —
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| LMArena Expert | 1279 | — |
Multilingual Not comparable
Step 2 16k Exp 202412: 43.7 (#181), Step 3.7 Flash: —
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1290 | — |
| LMArena Chinese | 1331 | — |
| LMArena Russian | 1324 | — |
Instruction Following Not comparable
Step 2 16k Exp 202412: 67.9 (#192), Step 3.7 Flash: —
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1287 | — |
Long Context Not comparable
Step 2 16k Exp 202412: 39.7 (#170), Step 3.7 Flash: —
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1307 | — |
Writing & Preference Not comparable
Step 2 16k Exp 202412: 52.3 (#173), Step 3.7 Flash: —
| Benchmark | Step 2 16k Exp 202412 | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1321 | — |
| LMArena Creative Writing | 1328 | — |
| LMArena Multi-Turn | 1292 | — |
Frequently asked questions
Is Step 2 16k Exp 202412 better than Step 3.7 Flash?
Step 2 16k Exp 202412 is the stronger model overall, scoring 39.2 to 37.3 on the Noometry Index.
Is Step 2 16k Exp 202412 or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 38.5 in the Noometry coding category.
How many benchmarks do Step 2 16k Exp 202412 and Step 3.7 Flash share?
0 benchmarks have published results for both models. Step 2 16k Exp 202412 has 12 scored results on Noometry and Step 3.7 Flash has 5.