Model comparison
Nova 2.0 Pro Preview vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 43.8 to 32.8 on the Noometry Index.
Last verified . 2 shared benchmarks.
StepFunSummary
- They share 2 benchmarks with published results for both. Nova 2.0 Pro Preview scores higher in 0 categories and Step 5 Preview in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 21.7.
- The biggest single-benchmark swing is CritPt: 0% for Nova 2.0 Pro Preview and 20.9% for Step 5 Preview.
Side by side
| Nova 2.0 Pro Preview | Step 5 Preview | |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 32.8 | 43.8 |
| Released | 2025-12-02 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 3 | 3 |
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Category by category
Coding Step 5 Preview leads
Nova 2.0 Pro Preview: 40.2 (#130), Step 5 Preview: 50.6 (#40)
| Benchmark | Nova 2.0 Pro Preview | Step 5 Preview |
|---|---|---|
| SciCode | 42.7% | 58.9% |
| LMArena WebDev | — | 1569 |
Agentic & Tool Use Not comparable
Nova 2.0 Pro Preview: 21.9 (#127), Step 5 Preview: —
| Benchmark | Nova 2.0 Pro Preview | Step 5 Preview |
|---|---|---|
| GDP.pdf | 2% | — |
Reasoning Step 5 Preview leads
Nova 2.0 Pro Preview: 21.7 (#189), Step 5 Preview: 38.0 (#58)
| Benchmark | Nova 2.0 Pro Preview | Step 5 Preview |
|---|---|---|
| CritPt | 0% | 20.9% |
Frequently asked questions
Is Nova 2.0 Pro Preview better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 43.8 to 32.8 on the Noometry Index.
Is Nova 2.0 Pro Preview or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 40.2 in the Noometry coding category.
How many benchmarks do Nova 2.0 Pro Preview and Step 5 Preview share?
2 benchmarks have published results for both models. Nova 2.0 Pro Preview has 3 scored results on Noometry and Step 5 Preview has 3.