Model comparison
Amazon Nova Experimental Chat 10 20 vs Step 3.5 Flash
Amazon Nova Experimental Chat 10 20 and Step 3.5 Flash score almost the same on the Noometry Index (42.1 vs 42.3), so choose on price, context window or the category you care about most.
Last verified . 17 shared benchmarks.
StepFunSummary
- They share 17 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 1 category and Step 3.5 Flash in 7 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Amazon Nova Experimental Chat 10 20 leads 28.4 to 22.2.
- Step 3.5 Flash has downloadable open weights; the other is API-only.
Side by side
| Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash | |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 42.1 | 42.3 |
| Released | — | 2026-01-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.30 |
| Results tracked | 17 | 19 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Too close to call
Amazon Nova Experimental Chat 10 20: 41.6 (#123), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1412 | 1436 |
Reasoning Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 28.4 (#106), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1411 |
| NYT Connections (extended) | — | 28.4% |
Math Step 3.5 Flash leads
Amazon Nova Experimental Chat 10 20: 39.0 (#119), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1425 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
Knowledge Step 3.5 Flash leads
Amazon Nova Experimental Chat 10 20: 38.5 (#144), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1386 | 1421 |
Multilingual Too close to call
Amazon Nova Experimental Chat 10 20: 49.5 (#131), Step 3.5 Flash: 50.5 (#119)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1372 | 1385 |
| LMArena Chinese | 1404 | 1447 |
| LMArena French | 1425 | 1421 |
| LMArena German | 1391 | 1405 |
| LMArena Japanese | 1360 | 1354 |
| LMArena Korean | 1324 | 1352 |
| LMArena Russian | 1371 | 1385 |
| LMArena Spanish | 1382 | 1419 |
Instruction Following Step 3.5 Flash leads
Amazon Nova Experimental Chat 10 20: 72.1 (#141), Step 3.5 Flash: 73.1 (#124)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1365 | 1385 |
Long Context Step 3.5 Flash leads
Amazon Nova Experimental Chat 10 20: 41.7 (#133), Step 3.5 Flash: 42.8 (#117)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1370 | 1402 |
Writing & Preference Step 3.5 Flash leads
Amazon Nova Experimental Chat 10 20: 56.6 (#136), Step 3.5 Flash: 58.8 (#113)
| Benchmark | Amazon Nova Experimental Chat 10 20 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1394 | 1403 |
| LMArena Creative Writing | 1318 | 1357 |
| LMArena Multi-Turn | 1364 | 1405 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than Step 3.5 Flash?
Amazon Nova Experimental Chat 10 20 and Step 3.5 Flash score almost the same on the Noometry Index (42.1 vs 42.3), so choose on price, context window or the category you care about most.
Is Amazon Nova Experimental Chat 10 20 or Step 3.5 Flash better for coding?
They score almost the same on coding (41.6 vs 42.4); test both on your own repository before choosing.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and Step 3.5 Flash share?
17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and Step 3.5 Flash has 19.