Model comparison
Longcat Flash Chat vs Nemotron 3.5 Lightning
Longcat Flash Chat is the stronger model overall, scoring 41.5 to 39.3 on the Noometry Index.
Last verified . 17 shared benchmarks.
NVIDIASummary
- They share 17 benchmarks with published results for both. Longcat Flash Chat scores higher in 7 categories and Nemotron 3.5 Lightning in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Longcat Flash Chat leads 61.2 to 48.5.
Side by side
| Longcat Flash Chat | Nemotron 3.5 Lightning | |
|---|---|---|
| Provider | Meituan | NVIDIA |
| Noometry Index | 41.5 | 39.3 |
| Released | — | 2026-08-11 |
| Weights | Open | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.06 |
| Output $ / M tokens | — | $0.16 |
| Results tracked | 19 | 18 |
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Category by category
Coding Longcat Flash Chat leads
Longcat Flash Chat: 42.9 (#85), Nemotron 3.5 Lightning: 39.6 (#143)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Coding | 1471 | 1370 |
Reasoning Nemotron 3.5 Lightning leads
Longcat Flash Chat: 18.3 (#267), Nemotron 3.5 Lightning: 25.7 (#128)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1335 |
| Kagi LLM Benchmark | 43.9% | — |
| NYT Connections (extended) | 17.7% | — |
Math Longcat Flash Chat leads
Longcat Flash Chat: 36.6 (#107), Nemotron 3.5 Lightning: 34.7 (#156)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Math | 1441 | 1355 |
Knowledge Longcat Flash Chat leads
Longcat Flash Chat: 40.0 (#111), Nemotron 3.5 Lightning: 36.9 (#154)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Expert | 1454 | 1354 |
Multilingual Longcat Flash Chat leads
Longcat Flash Chat: 52.1 (#95), Nemotron 3.5 Lightning: 44.0 (#175)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Non-English | 1404 | 1292 |
| LMArena Chinese | 1465 | 1356 |
| LMArena French | 1457 | 1369 |
| LMArena German | 1409 | 1280 |
| LMArena Japanese | 1373 | 1213 |
| LMArena Korean | 1372 | 1233 |
| LMArena Russian | 1396 | 1257 |
| LMArena Spanish | 1445 | 1321 |
Instruction Following Longcat Flash Chat leads
Longcat Flash Chat: 74.6 (#92), Nemotron 3.5 Lightning: 69.8 (#166)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Instruction Following | 1411 | 1317 |
Long Context Longcat Flash Chat leads
Longcat Flash Chat: 43.5 (#89), Nemotron 3.5 Lightning: 39.9 (#160)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Longer Query | 1425 | 1312 |
Writing & Preference Longcat Flash Chat leads
Longcat Flash Chat: 61.2 (#88), Nemotron 3.5 Lightning: 48.5 (#198)
| Benchmark | Longcat Flash Chat | Nemotron 3.5 Lightning |
|---|---|---|
| LMArena Text | 1427 | 1324 |
| LMArena Creative Writing | 1388 | 1254 |
| LMArena Multi-Turn | 1418 | 1327 |
| EQ-Bench Creative Writing | — | 1280 |
Frequently asked questions
Is Longcat Flash Chat better than Nemotron 3.5 Lightning?
Longcat Flash Chat is the stronger model overall, scoring 41.5 to 39.3 on the Noometry Index.
Is Longcat Flash Chat or Nemotron 3.5 Lightning better for coding?
Longcat Flash Chat scores higher on coding benchmarks: 42.9 versus 39.6 in the Noometry coding category.
How many benchmarks do Longcat Flash Chat and Nemotron 3.5 Lightning share?
17 benchmarks have published results for both models. Longcat Flash Chat has 19 scored results on Noometry and Nemotron 3.5 Lightning has 18.