Model comparison
GPT-5 Pro vs Nemotron 3 Ultra
GPT-5 Pro is the stronger model overall, scoring 46.2 to 44.7 on the Noometry Index. Nemotron 3 Ultra costs 39× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Last verified . 2 shared benchmarks.
NVIDIASummary
- They share 2 benchmarks with published results for both. GPT-5 Pro scores higher in 4 categories and Nemotron 3 Ultra in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 Pro leads 48.0 to 34.4.
- The biggest single-benchmark swing is WeirdML: 60.4% for GPT-5 Pro and 43.5% for Nemotron 3 Ultra.
- Nemotron 3 Ultra is cheaper at $0.60 / $2.40 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- GPT-5 Pro accepts more context: 400K tokens versus 262K.
- Nemotron 3 Ultra has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Pro | Nemotron 3 Ultra | |
|---|---|---|
| Provider | OpenAI | NVIDIA |
| Noometry Index | 46.2 | 44.7 |
| Released | 2025-10-06 | 2026-06-04 |
| Weights | Proprietary | Open |
| Context window | 400K | 262K |
| Max output | 272K | 128K |
| Input $ / M tokens | $15 | $0.60 |
| Output $ / M tokens | $120 | $2.40 |
| Results tracked | 12 | 29 |
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Category by category
Coding GPT-5 Pro leads
GPT-5 Pro: 43.4 (#77), Nemotron 3 Ultra: 37.7 (#174)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| WeirdML | 60.4% | 43.5% |
| FrontierCode | — | 13.6% |
| SciCode | — | 40.3% |
| LMArena Coding | — | 1468 |
| AlgoTune | 1.31 | — |
Reasoning GPT-5 Pro leads
GPT-5 Pro: 39.2 (#52), Nemotron 3 Ultra: 30.3 (#78)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| Epoch Capabilities Index | 150.26 | 146.2 |
| ARC-AGI-2 | 18.3% | — |
| SimpleBench | 61.6% | — |
| Kagi LLM Benchmark | 76.8% | — |
| ARC-AGI-1 | 70.2% | — |
| CritPt | — | 3.1% |
| Chess Puzzles | — | 12% |
| EnigmaEval | 18.8% | — |
| LMArena Hard Prompts | — | 1452 |
| Mystery Game Puzzles | — | 20% |
| DTBench | — | 90.1% |
| LMCA | — | 36.9% |
Math GPT-5 Pro leads
GPT-5 Pro: 48.0 (#53), Nemotron 3 Ultra: 34.4 (#160)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| OTIS Mock AIME 2024-2025 | — | 86.7% |
| ProofBench | — | 2% |
| LMArena Math | — | 1456 |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge GPT-5 Pro leads
GPT-5 Pro: 56.2 (#39), Nemotron 3 Ultra: 52.5 (#56)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| GPQA Diamond | — | 85.4% |
| Humanity's Last Exam | 31.6% | — |
| LMArena Expert | — | 1472 |
Multilingual Not comparable
GPT-5 Pro: —, Nemotron 3 Ultra: 53.7 (#61)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| LMArena Non-English | — | 1427 |
| LMArena Chinese | — | 1498 |
| LMArena French | — | 1475 |
| LMArena German | — | 1471 |
| LMArena Korean | — | 1387 |
| LMArena Russian | — | 1415 |
| LMArena Spanish | — | 1452 |
Instruction Following Not comparable
GPT-5 Pro: —, Nemotron 3 Ultra: 74.9 (#84)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| LMArena Instruction Following | — | 1417 |
Long Context Not comparable
GPT-5 Pro: —, Nemotron 3 Ultra: 43.9 (#77)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| LMArena Longer Query | — | 1437 |
Writing & Preference Not comparable
GPT-5 Pro: —, Nemotron 3 Ultra: 66.3 (#35)
| Benchmark | GPT-5 Pro | Nemotron 3 Ultra |
|---|---|---|
| LMArena Text | — | 1444 |
| LMArena Creative Writing | — | 1392 |
| EQ-Bench Creative Writing | — | 1692 |
| LMArena Multi-Turn | — | 1412 |
Frequently asked questions
Is GPT-5 Pro better than Nemotron 3 Ultra?
GPT-5 Pro is the stronger model overall, scoring 46.2 to 44.7 on the Noometry Index. Nemotron 3 Ultra costs 39× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5 Pro or Nemotron 3 Ultra?
Nemotron 3 Ultra is cheaper. It lists at $0.60 per million input tokens and $2.40 per million output tokens; GPT-5 Pro lists at $15 and $120.
Is GPT-5 Pro or Nemotron 3 Ultra better for coding?
GPT-5 Pro scores higher on coding benchmarks: 43.4 versus 37.7 in the Noometry coding category.
Which has the bigger context window?
GPT-5 Pro does, with 400K tokens against 262K.
How many benchmarks do GPT-5 Pro and Nemotron 3 Ultra share?
2 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Nemotron 3 Ultra has 29.