Model comparison
GPT-5 Pro vs Nemotron 3.5 Lightning
GPT-5 Pro is the stronger model overall, scoring 46.2 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 485× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
NVIDIASummary
- The widest gap is in knowledge, where GPT-5 Pro leads 56.2 to 36.9.
- Nemotron 3.5 Lightning is cheaper at $0.06 / $0.16 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- GPT-5 Pro accepts more context: 400K tokens versus 262K.
- Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Pro | Nemotron 3.5 Lightning | |
|---|---|---|
| Provider | OpenAI | NVIDIA |
| Noometry Index | 46.2 | 39.3 |
| Released | 2025-10-06 | 2026-08-11 |
| Weights | Proprietary | Open |
| Context window | 400K | 262K |
| Max output | 272K | 262K |
| Input $ / M tokens | $15 | $0.06 |
| Output $ / M tokens | $120 | $0.16 |
| Results tracked | 12 | 18 |
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Category by category
Coding GPT-5 Pro leads
GPT-5 Pro: 43.4 (#77), Nemotron 3.5 Lightning: 39.6 (#143)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| WeirdML | 60.4% | — |
| LMArena Coding | — | 1370 |
| AlgoTune | 1.31 | — |
Reasoning GPT-5 Pro leads
GPT-5 Pro: 39.2 (#52), Nemotron 3.5 Lightning: 25.7 (#128)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| ARC-AGI-2 | 18.3% | — |
| SimpleBench | 61.6% | — |
| Kagi LLM Benchmark | 76.8% | — |
| ARC-AGI-1 | 70.2% | — |
| EnigmaEval | 18.8% | — |
| LMArena Hard Prompts | — | 1335 |
| Epoch Capabilities Index | 150.26 | — |
Math GPT-5 Pro leads
GPT-5 Pro: 48.0 (#53), Nemotron 3.5 Lightning: 34.7 (#156)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| LMArena Math | — | 1355 |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge GPT-5 Pro leads
GPT-5 Pro: 56.2 (#39), Nemotron 3.5 Lightning: 36.9 (#154)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |
| LMArena Expert | — | 1354 |
Multilingual Not comparable
GPT-5 Pro: —, Nemotron 3.5 Lightning: 44.0 (#175)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Non-English | — | 1292 |
| LMArena Chinese | — | 1356 |
| LMArena French | — | 1369 |
| LMArena German | — | 1280 |
| LMArena Japanese | — | 1213 |
| LMArena Korean | — | 1233 |
| LMArena Russian | — | 1257 |
| LMArena Spanish | — | 1321 |
Instruction Following Not comparable
GPT-5 Pro: —, Nemotron 3.5 Lightning: 69.8 (#166)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1317 |
Long Context Not comparable
GPT-5 Pro: —, Nemotron 3.5 Lightning: 39.9 (#160)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Longer Query | — | 1312 |
Writing & Preference Not comparable
GPT-5 Pro: —, Nemotron 3.5 Lightning: 48.5 (#198)
| Benchmark | GPT-5 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Text | — | 1324 |
| LMArena Creative Writing | — | 1254 |
| EQ-Bench Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1327 |
Frequently asked questions
Is GPT-5 Pro better than Nemotron 3.5 Lightning?
GPT-5 Pro is the stronger model overall, scoring 46.2 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 485× 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 3.5 Lightning?
Nemotron 3.5 Lightning is cheaper. It lists at $0.06 per million input tokens and $0.16 per million output tokens; GPT-5 Pro lists at $15 and $120.
Is GPT-5 Pro or Nemotron 3.5 Lightning better for coding?
GPT-5 Pro scores higher on coding benchmarks: 43.4 versus 39.6 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 3.5 Lightning share?
0 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Nemotron 3.5 Lightning has 18.