Model comparison
Nova Premier 1.0 vs Step 3.5 Flash
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 38.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in math, where Step 3.5 Flash leads 42.6 to 33.8.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $2.50 / $12.50 for Nova Premier 1.0.
- Nova Premier 1.0 accepts more context: 1M tokens versus 256K.
- Step 3.5 Flash has downloadable open weights; the other is API-only.
Side by side
| Nova Premier 1.0 | Step 3.5 Flash | |
|---|---|---|
| Provider | Amazon | StepFun |
| Noometry Index | 38.3 | 42.3 |
| Released | 2025-04-30 | 2026-01-29 |
| Weights | Proprietary | Open |
| Context window | 1M | 256K |
| Max output | 10K | 256K |
| Input $ / M tokens | $2.50 | $0.10 |
| Output $ / M tokens | $12.50 | $0.30 |
| Results tracked | 6 | 19 |
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Category by category
Coding Not comparable
Nova Premier 1.0: —, Step 3.5 Flash: 42.4 (#105)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | — | 1436 |
Reasoning Too close to call
Nova Premier 1.0: 23.0 (#185), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| Kagi LLM Benchmark | 44.8% | — |
| NYT Connections (extended) | — | 28.4% |
| LMArena Hard Prompts | — | 1411 |
Math Step 3.5 Flash leads
Nova Premier 1.0: 33.8 (#199), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 66.8% |
| Omni-MATH | 35% | — |
| LMArena Math | — | 1408 |
Knowledge Step 3.5 Flash leads
Nova Premier 1.0: 35.8 (#180), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| MMLU-Pro | 72.6% | — |
| GPQA (HELM) | 51.8% | — |
| LMArena Expert | — | 1421 |
Multilingual Not comparable
Nova Premier 1.0: —, Step 3.5 Flash: 50.5 (#119)
| Benchmark | Nova Premier 1.0 | 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 Step 3.5 Flash leads
Nova Premier 1.0: 66.8 (#204), Step 3.5 Flash: 73.1 (#124)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| IFEval | 80.3% | — |
| LMArena Instruction Following | — | 1385 |
Long Context Not comparable
Nova Premier 1.0: —, Step 3.5 Flash: 42.8 (#117)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | — | 1402 |
Writing & Preference Step 3.5 Flash leads
Nova Premier 1.0: 51.0 (#178), Step 3.5 Flash: 58.8 (#113)
| Benchmark | Nova Premier 1.0 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | — | 1403 |
| LMArena Creative Writing | — | 1357 |
| WildBench | 78.8% | — |
| LMArena Multi-Turn | — | 1405 |
Frequently asked questions
Is Nova Premier 1.0 better than Step 3.5 Flash?
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 38.3 on the Noometry Index.
Which is cheaper, Nova Premier 1.0 or Step 3.5 Flash?
Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Nova Premier 1.0 lists at $2.50 and $12.50.
Which has the bigger context window?
Nova Premier 1.0 does, with 1M tokens against 256K.
How many benchmarks do Nova Premier 1.0 and Step 3.5 Flash share?
0 benchmarks have published results for both models. Nova Premier 1.0 has 6 scored results on Noometry and Step 3.5 Flash has 19.