Model comparison
GPT-5.2 Pro vs Nemotron 3.5 Lightning
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 40.0 on the Noometry Index. Nemotron 3.5 Lightning costs 660× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
NVIDIASummary
- The widest gap is in math, where GPT-5.2 Pro leads 65.3 to 37.5.
- Nemotron 3.5 Lightning is cheaper at $0.05 / $0.20 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- GPT-5.2 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-5.2 Pro | Nemotron 3.5 Lightning | |
|---|---|---|
| Provider | OpenAI | NVIDIA |
| Noometry Index | 52.3 | 40.0 |
| Released | 2025-12-11 | 2026-08-11 |
| Weights | Proprietary | Open |
| Context window | 400K | 262K |
| Max output | 128K | 262K |
| Input $ / M tokens | $21 | $0.05 |
| Output $ / M tokens | $168 | $0.20 |
| Results tracked | 8 | 18 |
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Category by category
Coding Not comparable
GPT-5.2 Pro: —, Nemotron 3.5 Lightning: 40.4 (#141)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Coding | — | 1375 |
Reasoning GPT-5.2 Pro leads
GPT-5.2 Pro: 51.5 (#33), Nemotron 3.5 Lightning: 26.8 (#127)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| NYT Connections (extended) | 79.3% | — |
| ARC-AGI-1 | 90.5% | — |
| LMArena Hard Prompts | — | 1337 |
| Epoch Capabilities Index | 155.4 | — |
Math GPT-5.2 Pro leads
GPT-5.2 Pro: 65.3 (#29), Nemotron 3.5 Lightning: 37.5 (#155)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| LMArena Math | — | 1359 |
| FrontierMath Tier 4 (v1) | 31.3% | — |
Knowledge Not comparable
GPT-5.2 Pro: —, Nemotron 3.5 Lightning: 37.5 (#154)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Expert | — | 1356 |
Multilingual Not comparable
GPT-5.2 Pro: —, Nemotron 3.5 Lightning: 44.0 (#180)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Non-English | — | 1295 |
| LMArena Chinese | — | 1359 |
| LMArena French | — | 1366 |
| LMArena German | — | 1282 |
| LMArena Japanese | — | 1206 |
| LMArena Korean | — | 1238 |
| LMArena Russian | — | 1253 |
| LMArena Spanish | — | 1345 |
Instruction Following Not comparable
GPT-5.2 Pro: —, Nemotron 3.5 Lightning: 69.6 (#170)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1318 |
Long Context Not comparable
GPT-5.2 Pro: —, Nemotron 3.5 Lightning: 39.9 (#165)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Longer Query | — | 1314 |
Writing & Preference Not comparable
GPT-5.2 Pro: —, Nemotron 3.5 Lightning: 48.5 (#201)
| Benchmark | GPT-5.2 Pro | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Text | — | 1327 |
| LMArena Creative Writing | — | 1254 |
| EQ-Bench Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1328 |
Frequently asked questions
Is GPT-5.2 Pro better than Nemotron 3.5 Lightning?
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 40.0 on the Noometry Index. Nemotron 3.5 Lightning costs 660× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.2 Pro or Nemotron 3.5 Lightning?
Nemotron 3.5 Lightning is cheaper. It lists at $0.05 per million input tokens and $0.20 per million output tokens; GPT-5.2 Pro lists at $21 and $168.
Which has the bigger context window?
GPT-5.2 Pro does, with 400K tokens against 262K.
How many benchmarks do GPT-5.2 Pro and Nemotron 3.5 Lightning share?
0 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Nemotron 3.5 Lightning has 18.