Model comparison
GPT-5.4 mini vs Nemotron 3.5 Lightning
GPT-5.4 mini is the stronger model overall, scoring 44.8 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 20× less per token, which makes it the better buy when GPT-5.4 mini's lead doesn't matter for your workload.
Last verified . 18 shared benchmarks.
NVIDIASummary
- They share 18 benchmarks with published results for both. GPT-5.4 mini scores higher in 8 categories and Nemotron 3.5 Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.4 mini leads 64.2 to 48.5.
- Nemotron 3.5 Lightning is cheaper at $0.06 / $0.16 per million input/output tokens, against $0.75 / $4.50 for GPT-5.4 mini.
- GPT-5.4 mini accepts more context: 400K tokens versus 262K.
- Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 mini | Nemotron 3.5 Lightning | |
|---|---|---|
| Provider | OpenAI | NVIDIA |
| Noometry Index | 44.8 | 39.3 |
| Released | 2026-03-17 | 2026-08-11 |
| Weights | Proprietary | Open |
| Context window | 400K | 262K |
| Max output | 128K | 262K |
| Input $ / M tokens | $0.75 | $0.06 |
| Output $ / M tokens | $4.50 | $0.16 |
| Results tracked | 46 | 18 |
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Category by category
Coding GPT-5.4 mini leads
GPT-5.4 mini: 45.0 (#67), Nemotron 3.5 Lightning: 39.6 (#143)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Coding | 1438 | 1370 |
| FrontierCode | 27% | — |
| LMArena WebDev | 1397 | — |
| SciCode | 49.9% | — |
| WeirdML | 60.3% | — |
| ALE-Bench | 1,189 | — |
Agentic & Tool Use Not comparable
GPT-5.4 mini: 29.6 (#74), Nemotron 3.5 Lightning: —
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| DeepResearch Bench | 36.3% | — |
Reasoning GPT-5.4 mini leads
GPT-5.4 mini: 30.3 (#77), Nemotron 3.5 Lightning: 25.7 (#128)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1335 |
| ARC-AGI-2 | 18.9% | — |
| Kagi LLM Benchmark | 37.9% | — |
| NYT Connections (extended) | 61.8% | — |
| ARC-AGI-1 | 63.7% | — |
| CritPt | 10% | — |
| Chess Puzzles | 24% | — |
| Thematic Generalization | 61.7% | — |
| Mystery Game Puzzles | 11% | — |
| DTBench | 80% | — |
| LMCA | 40.8% | — |
| Epoch Capabilities Index | 148.83 | — |
| ForecastBench | 57 | — |
Math GPT-5.4 mini leads
GPT-5.4 mini: 45.4 (#63), Nemotron 3.5 Lightning: 34.7 (#156)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Math | 1418 | 1355 |
| FrontierMath (Tiers 1-3) | 51.2% | — |
| FrontierMath Tier 4 | 9.8% | — |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | 21% | — |
| FrontierMath (Feb 2025 set) | 28.3% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |
Knowledge GPT-5.4 mini leads
GPT-5.4 mini: 51.4 (#62), Nemotron 3.5 Lightning: 36.9 (#154)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Expert | 1434 | 1354 |
| GPQA Diamond | 86.9% | — |
| SimpleQA Verified | 29.4% | — |
| Vectara Hallucination Rate | 5.5% | — |
Multimodal Not comparable
GPT-5.4 mini: 39.0 (#51), Nemotron 3.5 Lightning: —
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Vision | 1245 | — |
Multilingual GPT-5.4 mini leads
GPT-5.4 mini: 52.1 (#94), Nemotron 3.5 Lightning: 44.0 (#175)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Non-English | 1405 | 1292 |
| LMArena Chinese | 1446 | 1356 |
| LMArena French | 1440 | 1369 |
| LMArena German | 1407 | 1280 |
| LMArena Japanese | 1375 | 1213 |
| LMArena Korean | 1369 | 1233 |
| LMArena Russian | 1417 | 1257 |
| LMArena Spanish | 1403 | 1321 |
Instruction Following GPT-5.4 mini leads
GPT-5.4 mini: 74.3 (#99), Nemotron 3.5 Lightning: 69.8 (#166)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Instruction Following | 1405 | 1317 |
Long Context GPT-5.4 mini leads
GPT-5.4 mini: 42.9 (#107), Nemotron 3.5 Lightning: 39.9 (#160)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Longer Query | 1407 | 1312 |
Writing & Preference GPT-5.4 mini leads
GPT-5.4 mini: 64.2 (#56), Nemotron 3.5 Lightning: 48.5 (#198)
| Benchmark | GPT-5.4 mini | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Text | 1411 | 1324 |
| LMArena Creative Writing | 1370 | 1254 |
| EQ-Bench Creative Writing | 1665 | 1280 |
| LMArena Multi-Turn | 1429 | 1327 |
Frequently asked questions
Is GPT-5.4 mini better than Nemotron 3.5 Lightning?
GPT-5.4 mini is the stronger model overall, scoring 44.8 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 20× less per token, which makes it the better buy when GPT-5.4 mini's lead doesn't matter for your workload.
Which is cheaper, GPT-5.4 mini 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-5.4 mini lists at $0.75 and $4.50.
Is GPT-5.4 mini or Nemotron 3.5 Lightning better for coding?
GPT-5.4 mini scores higher on coding benchmarks: 45.0 versus 39.6 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 mini does, with 400K tokens against 262K.
How many benchmarks do GPT-5.4 mini and Nemotron 3.5 Lightning share?
18 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Nemotron 3.5 Lightning has 18.