Model comparison
Qwen3.5 Plus vs Qwen3-Next 80B-A3B Instruct
Qwen3.5 Plus and Qwen3-Next 80B-A3B Instruct score almost the same on the Noometry Index (42.9 vs 43.0), so choose on price, context window or the category you care about most.
Last verified . 1 shared benchmarks.
Alibaba (Qwen)Summary
- They share 1 benchmark with published results for both. Qwen3.5 Plus scores higher in 4 categories and Qwen3-Next 80B-A3B Instruct in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 38.8.
- Both cost about the same: $0.40 input and $2.40 output per million tokens.
- Qwen3.5 Plus accepts more context: 1M tokens versus 131K.
- Qwen3-Next 80B-A3B Instruct has downloadable open weights; the other is API-only.
Side by side
| Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct | |
|---|---|---|
| Provider | Alibaba (Qwen) | Alibaba (Qwen) |
| Noometry Index | 42.9 | 43.0 |
| Released | 2026-02-16 | 2025-09 |
| Weights | Proprietary | Open |
| Context window | 1M | 131K |
| Max output | 66K | 33K |
| Input $ / M tokens | $0.40 | $0.50 |
| Output $ / M tokens | $2.40 | $2 |
| Results tracked | 15 | 25 |
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Category by category
Coding Not comparable
Qwen3.5 Plus: —, Qwen3-Next 80B-A3B Instruct: 42.5 (#98)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| LMArena Coding | — | 1440 |
| ALE-Bench | 621.92 | — |
Agentic & Tool Use Not comparable
Qwen3.5 Plus: —, Qwen3-Next 80B-A3B Instruct: —
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| Vending-Bench 2 | 0.54 | — |
Reasoning Qwen3.5 Plus leads
Qwen3.5 Plus: 32.8 (#74), Qwen3-Next 80B-A3B Instruct: 31.1 (#81)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| Kagi LLM Benchmark | — | 66.7% |
| Chess Puzzles | 22% | — |
| LMArena Hard Prompts | — | 1428 |
| Mystery Game Puzzles | 17% | — |
| DTBench | 80.5% | — |
| LMCA | 36.4% | — |
| Epoch Capabilities Index | 146.78 | — |
Math Qwen3.5 Plus leads
Qwen3.5 Plus: 49.6 (#61), Qwen3-Next 80B-A3B Instruct: 38.8 (#126)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 86.7% | — |
| Omni-MATH | — | 46.7% |
| LMArena Math | — | 1440 |
| FrontierMath (Feb 2025 set) | 21% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |
Knowledge Qwen3.5 Plus leads
Qwen3.5 Plus: 46.0 (#83), Qwen3-Next 80B-A3B Instruct: 41.8 (#106)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| Vectara Hallucination Rate | 10.7% | 9.3% |
| GPQA Diamond | 84.8% | — |
| SimpleQA Verified | 25.4% | — |
| MMLU-Pro | — | 78.6% |
| GPQA (HELM) | — | 63% |
| LMArena Expert | — | 1417 |
Multilingual Not comparable
Qwen3.5 Plus: —, Qwen3-Next 80B-A3B Instruct: 52.1 (#93)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| LMArena Non-English | — | 1407 |
| LMArena Chinese | — | 1460 |
| LMArena French | — | 1413 |
| LMArena German | — | 1417 |
| LMArena Japanese | — | 1395 |
| LMArena Korean | — | 1364 |
| LMArena Russian | — | 1404 |
| LMArena Spanish | — | 1435 |
Instruction Following Not comparable
Qwen3.5 Plus: —, Qwen3-Next 80B-A3B Instruct: 70.8 (#159)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| IFEval | — | 81% |
| LMArena Instruction Following | — | 1389 |
Long Context Qwen3.5 Plus leads
Qwen3.5 Plus: 43.0 (#113), Qwen3-Next 80B-A3B Instruct: 37.0 (#223)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| Fiction.LiveBench | — | 55.6% |
| CL-bench | 19.8% | — |
| CL-bench Life | 12.4% | — |
| LMArena Longer Query | — | 1403 |
Writing & Preference Not comparable
Qwen3.5 Plus: —, Qwen3-Next 80B-A3B Instruct: 58.0 (#121)
| Benchmark | Qwen3.5 Plus | Qwen3-Next 80B-A3B Instruct |
|---|---|---|
| LMArena Text | — | 1417 |
| LMArena Creative Writing | — | 1334 |
| WildBench | — | 80.7% |
| LMArena Multi-Turn | — | 1416 |
Frequently asked questions
Is Qwen3.5 Plus better than Qwen3-Next 80B-A3B Instruct?
Qwen3.5 Plus and Qwen3-Next 80B-A3B Instruct score almost the same on the Noometry Index (42.9 vs 43.0), so choose on price, context window or the category you care about most.
Which is cheaper, Qwen3.5 Plus or Qwen3-Next 80B-A3B Instruct?
Qwen3-Next 80B-A3B Instruct is cheaper. It lists at $0.50 per million input tokens and $2 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 131K.
How many benchmarks do Qwen3.5 Plus and Qwen3-Next 80B-A3B Instruct share?
1 benchmark has published results for both models. Qwen3.5 Plus has 15 scored results on Noometry and Qwen3-Next 80B-A3B Instruct has 25.