Model comparison
Nova 2.0 Pro Preview vs Step 3.5 Flash
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 33.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- Step 3.5 Flash has downloadable open weights; the other is API-only.
Side by side
| Nova 2.0 Pro Preview | Step 3.5 Flash | |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 33.4 | 42.3 |
| Released | 2025-12-02 | 2026-01-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.30 |
| Results tracked | 3 | 19 |
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Category by category
Coding Step 3.5 Flash leads
Nova 2.0 Pro Preview: 40.8 (#133), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| SciCode | 42.7% | — |
| LMArena Coding | — | 1436 |
Agentic & Tool Use Not comparable
Nova 2.0 Pro Preview: 21.9 (#136), Step 3.5 Flash: —
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| GDP.pdf | 2% | — |
Reasoning Too close to call
Nova 2.0 Pro Preview: 22.4 (#194), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| NYT Connections (extended) | — | 28.4% |
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1411 |
Math Not comparable
Nova 2.0 Pro Preview: —, Step 3.5 Flash: 42.6 (#84)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 66.8% |
| LMArena Math | — | 1408 |
Knowledge Not comparable
Nova 2.0 Pro Preview: —, Step 3.5 Flash: 39.6 (#132)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | — | 1421 |
Multilingual Not comparable
Nova 2.0 Pro Preview: —, Step 3.5 Flash: 50.5 (#119)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | — | 1385 |
| LMArena Chinese | — | 1447 |
| LMArena French | — | 1421 |
| LMArena German | — | 1405 |
| LMArena Japanese | — | 1354 |
| LMArena Korean | — | 1352 |
| LMArena Russian | — | 1385 |
| LMArena Spanish | — | 1419 |
Instruction Following Not comparable
Nova 2.0 Pro Preview: —, Step 3.5 Flash: 73.1 (#124)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1385 |
Long Context Not comparable
Nova 2.0 Pro Preview: —, Step 3.5 Flash: 42.8 (#117)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | — | 1402 |
Writing & Preference Not comparable
Nova 2.0 Pro Preview: —, Step 3.5 Flash: 58.8 (#113)
| Benchmark | Nova 2.0 Pro Preview | Step 3.5 Flash |
|---|---|---|
| LMArena Text | — | 1403 |
| LMArena Creative Writing | — | 1357 |
| LMArena Multi-Turn | — | 1405 |
Frequently asked questions
Is Nova 2.0 Pro Preview better than Step 3.5 Flash?
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 33.4 on the Noometry Index.
Is Nova 2.0 Pro Preview or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 40.8 in the Noometry coding category.
How many benchmarks do Nova 2.0 Pro Preview and Step 3.5 Flash share?
0 benchmarks have published results for both models. Nova 2.0 Pro Preview has 3 scored results on Noometry and Step 3.5 Flash has 19.