Model comparison
Llama 3.1 Nemotron 51b Instruct vs Qwen3.5-Flash
Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 35.9 on the Noometry Index.
Last verified . 12 shared benchmarks.
NVIDIA
Alibaba (Qwen)Summary
- They share 12 benchmarks with published results for both. Llama 3.1 Nemotron 51b Instruct scores higher in 1 category and Qwen3.5-Flash in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Qwen3.5-Flash leads 57.9 to 43.4.
- Llama 3.1 Nemotron 51b Instruct has downloadable open weights; the other is API-only.
Side by side
| Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash | |
|---|---|---|
| Provider | NVIDIA | Alibaba (Qwen) |
| Noometry Index | 35.9 | 42.5 |
| Released | — | 2026-02-23 |
| Weights | Open | Proprietary |
| Context window | — | 1M |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.40 |
| Results tracked | 12 | 32 |
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Category by category
Coding Llama 3.1 Nemotron 51b Instruct leads
Llama 3.1 Nemotron 51b Instruct: 35.6 (#222), Qwen3.5-Flash: 34.2 (#242)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Coding | 1223 | 1412 |
| LMArena WebDev | — | 1244 |
| ALE-Bench | — | 221.8 |
Agentic & Tool Use Not comparable
Llama 3.1 Nemotron 51b Instruct: —, Qwen3.5-Flash: —
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| Vending-Bench 2 | — | 462.69 |
Reasoning Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 23.5 (#177), Qwen3.5-Flash: 33.7 (#72)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Hard Prompts | 1203 | 1403 |
| Chess Puzzles | — | 21% |
| Mystery Game Puzzles | — | 20% |
| DTBench | — | 82.9% |
| LMCA | — | 29.1% |
| Epoch Capabilities Index | — | 143.98 |
Math Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 34.6 (#193), Qwen3.5-Flash: 37.4 (#158)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Math | 1230 | 1407 |
| FrontierMath (Tiers 1-3) | — | 18.2% |
| OTIS Mock AIME 2024-2025 | — | 84.4% |
| FrontierMath (Feb 2025 set) | — | 6.2% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 31.9 (#218), Qwen3.5-Flash: 43.2 (#93)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Expert | 1167 | 1407 |
| GPQA Diamond | — | 82.3% |
| SimpleQA Verified | — | 20.3% |
| Vectara Hallucination Rate | — | 10.5% |
Multilingual Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 36.1 (#241), Qwen3.5-Flash: 50.5 (#121)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Non-English | 1181 | 1385 |
| LMArena Chinese | 1180 | 1446 |
| LMArena Russian | 1187 | 1379 |
| LMArena French | — | 1412 |
| LMArena German | — | 1390 |
| LMArena Japanese | — | 1368 |
| LMArena Korean | — | 1344 |
| LMArena Spanish | — | 1400 |
Instruction Following Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 62.9 (#233), Qwen3.5-Flash: 72.6 (#139)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Instruction Following | 1201 | 1374 |
Long Context Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 36.5 (#230), Qwen3.5-Flash: 42.4 (#124)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Longer Query | 1205 | 1392 |
Writing & Preference Qwen3.5-Flash leads
Llama 3.1 Nemotron 51b Instruct: 43.4 (#229), Qwen3.5-Flash: 57.9 (#122)
| Benchmark | Llama 3.1 Nemotron 51b Instruct | Qwen3.5-Flash |
|---|---|---|
| LMArena Text | 1228 | 1397 |
| LMArena Creative Writing | 1213 | 1343 |
| LMArena Multi-Turn | 1227 | 1393 |
Frequently asked questions
Is Llama 3.1 Nemotron 51b Instruct better than Qwen3.5-Flash?
Qwen3.5-Flash is the stronger model overall, scoring 42.5 to 35.9 on the Noometry Index.
Is Llama 3.1 Nemotron 51b Instruct or Qwen3.5-Flash better for coding?
Llama 3.1 Nemotron 51b Instruct scores higher on coding benchmarks: 35.6 versus 34.2 in the Noometry coding category.
How many benchmarks do Llama 3.1 Nemotron 51b Instruct and Qwen3.5-Flash share?
12 benchmarks have published results for both models. Llama 3.1 Nemotron 51b Instruct has 12 scored results on Noometry and Qwen3.5-Flash has 32.