# Llama 3.1 Nemotron 51b Instruct vs o3

> o3 is the stronger model overall, scoring 47.5 to 35.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/llama-3-1-nemotron-51b-instruct-vs-o3
- Last updated: 2026-10-12
- Shared benchmarks: 12

## Summary

- They share 12 benchmarks with published results for both. Llama 3.1 Nemotron 51b Instruct scores higher in 0 categories and o3 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o3 leads 54.6 to 31.9.
- Llama 3.1 Nemotron 51b Instruct has downloadable open weights; the other is API-only.

## Snapshot

| | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| Provider | NVIDIA | OpenAI |
| Noometry Index | 35.9 | 47.5 |
| Rank | 222 | 61 |
| Context | — | 200K |
| Input $/M | — | $2 |
| Output $/M | — | $8 |
| Weights | Open | Proprietary |

## Coding

- Llama 3.1 Nemotron 51b Instruct: 35.6 (#222)
- o3: 46.8 (#64)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Coding | 1223 | 1408 |
| SWE-bench Verified | — | 62.3% |
| SWE-bench Verified (bash only) | — | 58.4% |
| Aider Polyglot | — | 81.3% |
| GSO | — | 8.8% |
| WeirdML | — | 52.4% |
| CadEval | — | 74% |
| ALE-Bench | — | 933.55 |

## Agentic & Tool Use

- Llama 3.1 Nemotron 51b Instruct: —
- o3: 34.5 (#44)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |

## Reasoning

- Llama 3.1 Nemotron 51b Instruct: 23.5 (#177)
- o3: 32.0 (#78)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Hard Prompts | 1203 | 1402 |
| ARC-AGI-2 | — | 6.5% |
| SimpleBench | — | 53.1% |
| Kagi LLM Benchmark | — | 67.6% |
| ARC-AGI-1 | — | 60.8% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 38% |
| EnigmaEval | — | 13.1% |
| Mystery Game Puzzles | — | 29% |
| DTBench | — | 84.8% |
| LMCA | — | 39.7% |
| Epoch Capabilities Index | — | 146.86 |
| ForecastBench | — | 62.5 |

## Math

- Llama 3.1 Nemotron 51b Instruct: 34.6 (#193)
- o3: 50.2 (#58)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Math | 1230 | 1426 |
| FrontierMath (Tiers 1-3) | — | 33.3% |
| OTIS Mock AIME 2024-2025 | — | 84.4% |
| Omni-MATH | — | 71.4% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 18.7% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Llama 3.1 Nemotron 51b Instruct: 31.9 (#218)
- o3: 54.6 (#52)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Expert | 1167 | 1402 |
| GPQA Diamond | — | 81.8% |
| Humanity's Last Exam | — | 20.3% |
| SimpleQA Verified | — | 49.4% |
| MMLU-Pro | — | 85.9% |
| Confabulations | — | 14.4% |
| GPQA (HELM) | — | 75.3% |

## Multimodal

- Llama 3.1 Nemotron 51b Instruct: —
- o3: 41.4 (#36)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Vision | — | 1214 |
| GeoBench | — | 74% |
| VPCT | — | 52% |

## Multilingual

- Llama 3.1 Nemotron 51b Instruct: 36.1 (#241)
- o3: 51.7 (#105)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Non-English | 1181 | 1401 |
| LMArena Chinese | 1180 | 1437 |
| LMArena Russian | 1187 | 1406 |
| LMArena French | — | 1430 |
| LMArena German | — | 1420 |
| LMArena Japanese | — | 1403 |
| LMArena Korean | — | 1370 |
| LMArena Spanish | — | 1395 |

## Instruction Following

- Llama 3.1 Nemotron 51b Instruct: 62.9 (#233)
- o3: 72.8 (#127)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Instruction Following | 1201 | 1368 |
| IFEval | — | 86.9% |

## Long Context

- Llama 3.1 Nemotron 51b Instruct: 36.5 (#230)
- o3: 53.3 (#6)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Longer Query | 1205 | 1372 |
| Fiction.LiveBench | — | 88.9% |
| CL-bench | — | 17.8% |

## Writing & Preference

- Llama 3.1 Nemotron 51b Instruct: 43.4 (#229)
- o3: 63.5 (#64)

| Benchmark | Llama 3.1 Nemotron 51b Instruct | o3 |
|---|---|---|
| LMArena Text | 1228 | 1410 |
| LMArena Creative Writing | 1213 | 1359 |
| LMArena Multi-Turn | 1227 | 1405 |
| Short-Story Creative Writing | — | 83.9% |
| EQ-Bench Creative Writing | — | 1676 |
| WildBench | — | 86.1% |

## FAQ

### Is Llama 3.1 Nemotron 51b Instruct better than o3?

o3 is the stronger model overall, scoring 47.5 to 35.9 on the Noometry Index.

### Is Llama 3.1 Nemotron 51b Instruct or o3 better for coding?

o3 scores higher on coding benchmarks: 46.8 versus 35.6 in the Noometry coding category.

### How many benchmarks do Llama 3.1 Nemotron 51b Instruct and o3 share?

12 benchmarks have published results for both models. Llama 3.1 Nemotron 51b Instruct has 12 scored results on Noometry and o3 has 63.