Model comparison
Nemotron 3 Ultra vs o3
o3 is the stronger model overall, scoring 47.5 to 42.5 on the Noometry Index. Nemotron 3 Ultra costs 3.8× less per token, which makes it the better buy when o3's lead doesn't matter for your workload.
Last verified . 26 shared benchmarks.
NVIDIASummary
- They share 26 benchmarks with published results for both. Nemotron 3 Ultra scores higher in 3 categories and o3 in 6 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where o3 leads 50.2 to 35.3.
- The biggest single-benchmark swing is Chess Puzzles: 12% for Nemotron 3 Ultra and 38% for o3.
- Nemotron 3 Ultra is cheaper at $0.50 / $2.20 per million input/output tokens, against $2 / $8 for o3.
- Nemotron 3 Ultra accepts more context: 262K tokens versus 200K.
- Nemotron 3 Ultra has downloadable open weights; the other is API-only.
Side by side
| Nemotron 3 Ultra | o3 | |
|---|---|---|
| Provider | NVIDIA | OpenAI |
| Noometry Index | 42.5 | 47.5 |
| Released | 2026-06-04 | 2025-04-16 |
| Weights | Open | Proprietary |
| Context window | 262K | 200K |
| Max output | 128K | 100K |
| Input $ / M tokens | $0.50 | $2 |
| Output $ / M tokens | $2.20 | $8 |
| Results tracked | 30 | 63 |
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Category by category
Coding o3 leads
Nemotron 3 Ultra: 38.1 (#182), o3: 46.8 (#64)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| WeirdML | 43.5% | 52.4% |
| LMArena Coding | 1468 | 1408 |
| SWE-bench Verified | — | 62.3% |
| FrontierCode | 13.6% | — |
| SWE-bench Verified (bash only) | — | 58.4% |
| Aider Polyglot | — | 81.3% |
| SciCode | 40.3% | — |
| GSO | — | 8.8% |
| CadEval | — | 74% |
| ALE-Bench | — | 933.55 |
Agentic & Tool Use o3 leads
Nemotron 3 Ultra: 23.4 (#126), o3: 34.5 (#44)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| APEX-Agents | 22.7% | — |
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |
Reasoning o3 leads
Nemotron 3 Ultra: 31.0 (#82), o3: 32.0 (#78)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| CritPt | 3.1% | 1.4% |
| Chess Puzzles | 12% | 38% |
| LMArena Hard Prompts | 1452 | 1402 |
| Mystery Game Puzzles | 20% | 29% |
| DTBench | 90.1% | 84.8% |
| LMCA | 36.9% | 39.7% |
| Epoch Capabilities Index | 146.17 | 146.86 |
| ARC-AGI-2 | — | 6.5% |
| SimpleBench | — | 53.1% |
| Kagi LLM Benchmark | — | 67.6% |
| ARC-AGI-1 | — | 60.8% |
| EnigmaEval | — | 13.1% |
| ForecastBench | — | 62.5 |
Math o3 leads
Nemotron 3 Ultra: 35.3 (#187), o3: 50.2 (#58)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 86.7% | 84.4% |
| LMArena Math | 1457 | 1426 |
| FrontierMath (Tiers 1-3) | — | 33.3% |
| ProofBench | 2% | — |
| Omni-MATH | — | 71.4% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 18.7% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge o3 leads
Nemotron 3 Ultra: 52.5 (#61), o3: 54.6 (#52)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| GPQA Diamond | 85.4% | 81.8% |
| LMArena Expert | 1472 | 1402 |
| Humanity's Last Exam | — | 20.3% |
| SimpleQA Verified | — | 49.4% |
| MMLU-Pro | — | 85.9% |
| Confabulations | — | 14.4% |
| GPQA (HELM) | — | 75.3% |
Multimodal Not comparable
Nemotron 3 Ultra: —, o3: 41.4 (#36)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| LMArena Vision | — | 1214 |
| GeoBench | — | 74% |
| VPCT | — | 52% |
Multilingual Nemotron 3 Ultra leads
Nemotron 3 Ultra: 53.5 (#64), o3: 51.7 (#105)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| LMArena Non-English | 1427 | 1401 |
| LMArena Chinese | 1497 | 1437 |
| LMArena French | 1472 | 1430 |
| LMArena German | 1471 | 1420 |
| LMArena Korean | 1386 | 1370 |
| LMArena Russian | 1417 | 1406 |
| LMArena Spanish | 1454 | 1395 |
| LMArena Japanese | — | 1403 |
Instruction Following Nemotron 3 Ultra leads
Nemotron 3 Ultra: 74.7 (#88), o3: 72.8 (#127)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| LMArena Instruction Following | 1418 | 1368 |
| IFEval | — | 86.9% |
Long Context o3 leads
Nemotron 3 Ultra: 43.9 (#81), o3: 53.3 (#6)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| LMArena Longer Query | 1437 | 1372 |
| Fiction.LiveBench | — | 88.9% |
| CL-bench | — | 17.8% |
Writing & Preference Nemotron 3 Ultra leads
Nemotron 3 Ultra: 66.3 (#36), o3: 63.5 (#64)
| Benchmark | Nemotron 3 Ultra | o3 |
|---|---|---|
| LMArena Text | 1445 | 1410 |
| LMArena Creative Writing | 1398 | 1359 |
| EQ-Bench Creative Writing | 1692 | 1676 |
| LMArena Multi-Turn | 1411 | 1405 |
| Short-Story Creative Writing | — | 83.9% |
| WildBench | — | 86.1% |
Frequently asked questions
Is Nemotron 3 Ultra better than o3?
o3 is the stronger model overall, scoring 47.5 to 42.5 on the Noometry Index. Nemotron 3 Ultra costs 3.8× less per token, which makes it the better buy when o3's lead doesn't matter for your workload.
Which is cheaper, Nemotron 3 Ultra or o3?
Nemotron 3 Ultra is cheaper. It lists at $0.50 per million input tokens and $2.20 per million output tokens; o3 lists at $2 and $8.
Is Nemotron 3 Ultra or o3 better for coding?
o3 scores higher on coding benchmarks: 46.8 versus 38.1 in the Noometry coding category.
Which has the bigger context window?
Nemotron 3 Ultra does, with 262K tokens against 200K.
How many benchmarks do Nemotron 3 Ultra and o3 share?
26 benchmarks have published results for both models. Nemotron 3 Ultra has 30 scored results on Noometry and o3 has 63.