# Llama 3.1 Nemotron 51b Instruct vs Sonar

> Sonar is the stronger model overall, scoring 38.5 to 35.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/llama-3-1-nemotron-51b-instruct-vs-sonar
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in writing & preference, where Sonar leads 52.6 to 43.4.
- Llama 3.1 Nemotron 51b Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| Provider | NVIDIA | Perplexity |
| Noometry Index | 35.9 | 38.5 |
| Rank | 222 | 187 |
| Context | — | 128K |
| Input $/M | — | $1 |
| Output $/M | — | $1 |
| Weights | Open | Proprietary |

## Coding

- Llama 3.1 Nemotron 51b Instruct: 35.6 (#222)
- Sonar: 35.7 (#221)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1223 | — |

## Reasoning

- Llama 3.1 Nemotron 51b Instruct: 23.5 (#177)
- Sonar: 21.1 (#227)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1203 | — |
| LiveBench Data Analysis | — | 37.9% |
| LiveBench | — | 46.9% |

## Math

- Llama 3.1 Nemotron 51b Instruct: 34.6 (#193)
- Sonar: 33.7 (#200)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LiveBench Math | — | 41.6% |
| LMArena Math | 1230 | — |

## Knowledge

- Llama 3.1 Nemotron 51b Instruct: 31.9 (#218)
- Sonar: —

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LMArena Expert | 1167 | — |

## Multilingual

- Llama 3.1 Nemotron 51b Instruct: 36.1 (#241)
- Sonar: —

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LMArena Non-English | 1181 | — |
| LMArena Chinese | 1180 | — |
| LMArena Russian | 1187 | — |

## Instruction Following

- Llama 3.1 Nemotron 51b Instruct: 62.9 (#233)
- Sonar: 71.4 (#150)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| LMArena Instruction Following | 1201 | — |

## Long Context

- Llama 3.1 Nemotron 51b Instruct: 36.5 (#230)
- Sonar: —

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LMArena Longer Query | 1205 | — |

## Writing & Preference

- Llama 3.1 Nemotron 51b Instruct: 43.4 (#229)
- Sonar: 52.6 (#167)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | Sonar |
|---|---|---|
| LMArena Text | 1228 | — |
| LMArena Creative Writing | 1213 | — |
| LMArena Multi-Turn | 1227 | — |
| LiveBench Language | — | 44.1% |

## FAQ

### Is Llama 3.1 Nemotron 51b Instruct better than Sonar?

Sonar is the stronger model overall, scoring 38.5 to 35.9 on the Noometry Index.

### Is Llama 3.1 Nemotron 51b Instruct or Sonar better for coding?

They score almost the same on coding (35.6 vs 35.7); test both on your own repository before choosing.

### How many benchmarks do Llama 3.1 Nemotron 51b Instruct and Sonar share?

0 benchmarks have published results for both models. Llama 3.1 Nemotron 51b Instruct has 12 scored results on Noometry and Sonar has 7.