Model comparison
Amazon Nova Experimental Chat 11 10 vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 47.9 to 43.0 on the Noometry Index.
Last verified . 13 shared benchmarks.
StepFunSummary
- They share 13 benchmarks with published results for both. Amazon Nova Experimental Chat 11 10 scores higher in 0 categories and Step 5 Preview in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 40.0 to 29.1.
Side by side
| Amazon Nova Experimental Chat 11 10 | Step 5 Preview | |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 43.0 | 47.9 |
| 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 | 17 | 18 |
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Category by category
Coding Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 42.3 (#107), Step 5 Preview: 51.8 (#36)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Coding | 1433 | 1480 |
| LMArena WebDev | — | 1564 |
| SciCode | — | 58.9% |
Reasoning Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 29.1 (#95), Step 5 Preview: 40.0 (#57)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Hard Prompts | 1422 | 1465 |
| CritPt | — | 20.9% |
Math Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 39.1 (#114), Step 5 Preview: 46.1 (#72)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1431 | 1470 |
| ProofBench | — | 42% |
Knowledge Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 39.9 (#127), Step 5 Preview: 41.2 (#112)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1431 | 1470 |
Multimodal Not comparable
Amazon Nova Experimental Chat 11 10: —, Step 5 Preview: 41.0 (#41)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |
Multilingual Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 51.9 (#98), Step 5 Preview: 53.8 (#54)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1405 | 1432 |
| LMArena Chinese | 1463 | 1519 |
| LMArena Russian | 1394 | 1436 |
| LMArena Spanish | 1444 | 1439 |
| LMArena French | 1449 | — |
| LMArena German | 1395 | — |
| LMArena Japanese | 1383 | — |
| LMArena Korean | 1384 | — |
Instruction Following Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 73.2 (#122), Step 5 Preview: 76.0 (#50)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1387 | 1444 |
Long Context Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 42.5 (#121), Step 5 Preview: 44.5 (#64)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1395 | 1455 |
Writing & Preference Step 5 Preview leads
Amazon Nova Experimental Chat 11 10: 58.8 (#114), Step 5 Preview: 62.8 (#71)
| Benchmark | Amazon Nova Experimental Chat 11 10 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1415 | 1442 |
| LMArena Creative Writing | 1349 | 1410 |
| LMArena Multi-Turn | 1380 | 1447 |
Frequently asked questions
Is Amazon Nova Experimental Chat 11 10 better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 47.9 to 43.0 on the Noometry Index.
Is Amazon Nova Experimental Chat 11 10 or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 51.8 versus 42.3 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 11 10 and Step 5 Preview share?
13 benchmarks have published results for both models. Amazon Nova Experimental Chat 11 10 has 17 scored results on Noometry and Step 5 Preview has 18.