Model comparison
Llama 3.1 Nemotron 51b Instruct vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 43.8 to 35.2 on the Noometry Index.
Last verified . 0 shared benchmarks.
NVIDIA
StepFunSummary
- The widest gap is in coding, where Step 5 Preview leads 50.6 to 35.0.
- Llama 3.1 Nemotron 51b Instruct has downloadable open weights; the other is API-only.
Side by side
| Llama 3.1 Nemotron 51b Instruct | Step 5 Preview | |
|---|---|---|
| Provider | NVIDIA | StepFun |
| Noometry Index | 35.2 | 43.8 |
| Released | — | 2026-09-16 |
| Weights | Open | Proprietary |
| Context window | — | 1.02M |
| Max output | — | 66K |
| Input $ / M tokens | — | $1 |
| Output $ / M tokens | — | $2.70 |
| Results tracked | 12 | 3 |
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Category by category
Coding Step 5 Preview leads
Llama 3.1 Nemotron 51b Instruct: 35.0 (#219), Step 5 Preview: 50.6 (#40)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1223 | — |
Reasoning Step 5 Preview leads
Llama 3.1 Nemotron 51b Instruct: 22.5 (#177), Step 5 Preview: 38.0 (#58)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1204 | — |
Math Not comparable
Llama 3.1 Nemotron 51b Instruct: 32.0 (#189), Step 5 Preview: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena Math | 1230 | — |
Knowledge Not comparable
Llama 3.1 Nemotron 51b Instruct: 31.3 (#213), Step 5 Preview: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1167 | — |
Multilingual Not comparable
Llama 3.1 Nemotron 51b Instruct: 36.3 (#236), Step 5 Preview: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1181 | — |
| LMArena Chinese | 1179 | — |
| LMArena Russian | 1186 | — |
Instruction Following Not comparable
Llama 3.1 Nemotron 51b Instruct: 63.2 (#228), Step 5 Preview: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1201 | — |
Long Context Not comparable
Llama 3.1 Nemotron 51b Instruct: 36.5 (#225), Step 5 Preview: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1205 | — |
Writing & Preference Not comparable
Llama 3.1 Nemotron 51b Instruct: 43.5 (#224), Step 5 Preview: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Step 5 Preview |
|---|---|---|
| LMArena Text | 1228 | — |
| LMArena Creative Writing | 1213 | — |
| LMArena Multi-Turn | 1227 | — |
Frequently asked questions
Is Llama 3.1 Nemotron 51b Instruct better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 43.8 to 35.2 on the Noometry Index.
Is Llama 3.1 Nemotron 51b Instruct or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 35.0 in the Noometry coding category.
How many benchmarks do Llama 3.1 Nemotron 51b Instruct and Step 5 Preview share?
0 benchmarks have published results for both models. Llama 3.1 Nemotron 51b Instruct has 12 scored results on Noometry and Step 5 Preview has 3.