Model comparison
Amazon Nova Experimental Chat 12 10 vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 43.8 to 42.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 28.1.
Side by side
| Amazon Nova Experimental Chat 12 10 | Step 5 Preview | |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 42.3 | 43.8 |
| Released | — | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 12 | 3 |
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Category by category
Coding Step 5 Preview leads
Amazon Nova Experimental Chat 12 10: 41.5 (#112), Step 5 Preview: 50.6 (#40)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1430 | — |
Reasoning Step 5 Preview leads
Amazon Nova Experimental Chat 12 10: 28.1 (#93), Step 5 Preview: 38.0 (#58)
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1427 | — |
Math Not comparable
Amazon Nova Experimental Chat 12 10: 36.1 (#130), Step 5 Preview: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1418 | — |
Knowledge Not comparable
Amazon Nova Experimental Chat 12 10: 38.6 (#133), Step 5 Preview: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1409 | — |
Multilingual Not comparable
Amazon Nova Experimental Chat 12 10: 51.7 (#103), Step 5 Preview: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1399 | — |
| LMArena Chinese | 1440 | — |
| LMArena Russian | 1397 | — |
Instruction Following Not comparable
Amazon Nova Experimental Chat 12 10: 73.4 (#117), Step 5 Preview: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1387 | — |
Long Context Not comparable
Amazon Nova Experimental Chat 12 10: 42.4 (#120), Step 5 Preview: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1391 | — |
Writing & Preference Not comparable
Amazon Nova Experimental Chat 12 10: 59.7 (#104), Step 5 Preview: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1420 | — |
| LMArena Creative Writing | 1351 | — |
| LMArena Multi-Turn | 1409 | — |
Frequently asked questions
Is Amazon Nova Experimental Chat 12 10 better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 43.8 to 42.3 on the Noometry Index.
Is Amazon Nova Experimental Chat 12 10 or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 41.5 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 12 10 and Step 5 Preview share?
0 benchmarks have published results for both models. Amazon Nova Experimental Chat 12 10 has 12 scored results on Noometry and Step 5 Preview has 3.