# Nemotron 3 Ultra vs Step 5 Preview

> Nemotron 3 Ultra and Step 5 Preview score almost the same on the Noometry Index (44.7 vs 43.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/nemotron-3-ultra-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Nemotron 3 Ultra scores higher in 0 categories and Step 5 Preview in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 5 Preview leads 50.6 to 37.7.
- The biggest single-benchmark swing is SciCode: 40.3% for Nemotron 3 Ultra and 58.9% for Step 5 Preview.
- Nemotron 3 Ultra is cheaper at $0.60 / $2.40 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- Step 5 Preview accepts more context: 1.02M tokens versus 262K.
- Nemotron 3 Ultra has downloadable open weights; the other is API-only.

## Snapshot

| | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| Provider | NVIDIA | StepFun |
| Noometry Index | 44.7 | 43.8 |
| Rank | 71 | 78 |
| Context | 262K | 1.02M |
| Input $/M | $0.60 | $1 |
| Output $/M | $2.40 | $2.70 |
| Weights | Open | Proprietary |

## Coding

- Nemotron 3 Ultra: 37.7 (#174)
- Step 5 Preview: 50.6 (#40)

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| SciCode | 40.3% | 58.9% |
| FrontierCode | 13.6% | — |
| LMArena WebDev | — | 1569 |
| WeirdML | 43.5% | — |
| LMArena Coding | 1468 | — |

## Reasoning

- Nemotron 3 Ultra: 30.3 (#78)
- Step 5 Preview: 38.0 (#58)

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| CritPt | 3.1% | 20.9% |
| Chess Puzzles | 12% | — |
| LMArena Hard Prompts | 1452 | — |
| Mystery Game Puzzles | 20% | — |
| DTBench | 90.1% | — |
| LMCA | 36.9% | — |
| Epoch Capabilities Index | 146.2 | — |

## Math

- Nemotron 3 Ultra: 34.4 (#160)
- Step 5 Preview: —

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 86.7% | — |
| ProofBench | 2% | — |
| LMArena Math | 1456 | — |

## Knowledge

- Nemotron 3 Ultra: 52.5 (#56)
- Step 5 Preview: —

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| GPQA Diamond | 85.4% | — |
| LMArena Expert | 1472 | — |

## Multilingual

- Nemotron 3 Ultra: 53.7 (#61)
- Step 5 Preview: —

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1427 | — |
| LMArena Chinese | 1498 | — |
| LMArena French | 1475 | — |
| LMArena German | 1471 | — |
| LMArena Korean | 1387 | — |
| LMArena Russian | 1415 | — |
| LMArena Spanish | 1452 | — |

## Instruction Following

- Nemotron 3 Ultra: 74.9 (#84)
- Step 5 Preview: —

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1417 | — |

## Long Context

- Nemotron 3 Ultra: 43.9 (#77)
- Step 5 Preview: —

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1437 | — |

## Writing & Preference

- Nemotron 3 Ultra: 66.3 (#35)
- Step 5 Preview: —

| Benchmark | Nemotron 3 Ultra | Step 5 Preview |
|---|---|---|
| LMArena Text | 1444 | — |
| LMArena Creative Writing | 1392 | — |
| EQ-Bench Creative Writing | 1692 | — |
| LMArena Multi-Turn | 1412 | — |

## FAQ

### Is Nemotron 3 Ultra better than Step 5 Preview?

Nemotron 3 Ultra and Step 5 Preview score almost the same on the Noometry Index (44.7 vs 43.8), so choose on price, context window or the category you care about most.

### Which is cheaper, Nemotron 3 Ultra or Step 5 Preview?

Nemotron 3 Ultra is cheaper. It lists at $0.60 per million input tokens and $2.40 per million output tokens; Step 5 Preview lists at $1 and $2.70.

### Is Nemotron 3 Ultra or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 37.7 in the Noometry coding category.

### Which has the bigger context window?

Step 5 Preview does, with 1.02M tokens against 262K.

### How many benchmarks do Nemotron 3 Ultra and Step 5 Preview share?

2 benchmarks have published results for both models. Nemotron 3 Ultra has 29 scored results on Noometry and Step 5 Preview has 3.