Model comparison
Nemotron 3 Ultra vs Step 3.7 Flash
Nemotron 3 Ultra is the stronger model overall, scoring 42.5 to 37.3 on the Noometry Index. Step 3.7 Flash costs 2.5× less per token, which makes it the better buy when Nemotron 3 Ultra's lead doesn't matter for your workload.
Last verified . 2 shared benchmarks.
NVIDIA
StepFunSummary
- They share 2 benchmarks with published results for both. Nemotron 3 Ultra scores higher in 1 category and Step 3.7 Flash in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Nemotron 3 Ultra leads 31.0 to 21.6.
- Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $0.60 / $2.40 for Nemotron 3 Ultra.
- Nemotron 3 Ultra accepts more context: 262K tokens versus 256K.
Side by side
| Nemotron 3 Ultra | Step 3.7 Flash | |
|---|---|---|
| Provider | NVIDIA | StepFun |
| Noometry Index | 42.5 | 37.3 |
| Released | 2026-06-04 | 2026-05-29 |
| Weights | Open | Open |
| Context window | 262K | 256K |
| Max output | 128K | 256K |
| Input $ / M tokens | $0.60 | $0.18 |
| Output $ / M tokens | $2.40 | $1.11 |
| Results tracked | 30 | 5 |
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Category by category
Coding Step 3.7 Flash leads
Nemotron 3 Ultra: 38.1 (#182), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| SciCode | 40.3% | 40% |
| FrontierCode | 13.6% | — |
| WeirdML | 43.5% | — |
| LMArena Coding | 1468 | — |
| ALE-Bench | — | 694.12 |
Agentic & Tool Use Not comparable
Nemotron 3 Ultra: 23.4 (#126), Step 3.7 Flash: —
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| APEX-Agents | 22.7% | — |
Reasoning Nemotron 3 Ultra leads
Nemotron 3 Ultra: 31.0 (#82), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| CritPt | 3.1% | 2.3% |
| NYT Connections (extended) | — | 39.7% |
| Chess Puzzles | 12% | — |
| LMArena Hard Prompts | 1452 | — |
| Mystery Game Puzzles | 20% | — |
| DTBench | 90.1% | — |
| LMCA | 36.9% | — |
| Epoch Capabilities Index | 146.17 | — |
Math Step 3.7 Flash leads
Nemotron 3 Ultra: 35.3 (#187), Step 3.7 Flash: 42.9 (#82)
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| OTIS Mock AIME 2024-2025 | 86.7% | — |
| ProofBench | 2% | — |
| LMArena Math | 1457 | — |
Knowledge Not comparable
Nemotron 3 Ultra: 52.5 (#61), Step 3.7 Flash: —
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| GPQA Diamond | 85.4% | — |
| LMArena Expert | 1472 | — |
Multilingual Not comparable
Nemotron 3 Ultra: 53.5 (#64), Step 3.7 Flash: —
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1427 | — |
| LMArena Chinese | 1497 | — |
| LMArena French | 1472 | — |
| LMArena German | 1471 | — |
| LMArena Korean | 1386 | — |
| LMArena Russian | 1417 | — |
| LMArena Spanish | 1454 | — |
Instruction Following Not comparable
Nemotron 3 Ultra: 74.7 (#88), Step 3.7 Flash: —
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1418 | — |
Long Context Not comparable
Nemotron 3 Ultra: 43.9 (#81), Step 3.7 Flash: —
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1437 | — |
Writing & Preference Not comparable
Nemotron 3 Ultra: 66.3 (#36), Step 3.7 Flash: —
| Benchmark | Nemotron 3 Ultra | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1445 | — |
| LMArena Creative Writing | 1398 | — |
| EQ-Bench Creative Writing | 1692 | — |
| LMArena Multi-Turn | 1411 | — |
Frequently asked questions
Is Nemotron 3 Ultra better than Step 3.7 Flash?
Nemotron 3 Ultra is the stronger model overall, scoring 42.5 to 37.3 on the Noometry Index. Step 3.7 Flash costs 2.5× less per token, which makes it the better buy when Nemotron 3 Ultra's lead doesn't matter for your workload.
Which is cheaper, Nemotron 3 Ultra or Step 3.7 Flash?
Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; Nemotron 3 Ultra lists at $0.60 and $2.40.
Is Nemotron 3 Ultra or Step 3.7 Flash better for coding?
Step 3.7 Flash scores higher on coding benchmarks: 40.0 versus 38.1 in the Noometry coding category.
Which has the bigger context window?
Nemotron 3 Ultra does, with 262K tokens against 256K.
How many benchmarks do Nemotron 3 Ultra and Step 3.7 Flash share?
2 benchmarks have published results for both models. Nemotron 3 Ultra has 30 scored results on Noometry and Step 3.7 Flash has 5.