Model comparison
Qwen3.5 Plus vs Sonar
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 38.5 on the Noometry Index.
Last verified . 0 shared benchmarks.
Alibaba (Qwen)
PerplexitySummary
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 33.7.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $1 / $1 for Sonar.
- Qwen3.5 Plus accepts more context: 1M tokens versus 128K.
Side by side
| Qwen3.5 Plus | Sonar | |
|---|---|---|
| Provider | Alibaba (Qwen) | Perplexity |
| Noometry Index | 42.9 | 38.5 |
| Released | 2026-02-16 | 2024-01-01 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 128K |
| Max output | 66K | 4K |
| Input $ / M tokens | $0.40 | $1 |
| Output $ / M tokens | $2.40 | $1 |
| Results tracked | 15 | 7 |
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Category by category
Coding Not comparable
Qwen3.5 Plus: —, Sonar: 35.7 (#221)
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| LiveBench Coding | — | 35.1% |
| ALE-Bench | 621.92 | — |
Agentic & Tool Use Not comparable
Qwen3.5 Plus: —, Sonar: —
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| Vending-Bench 2 | 0.54 | — |
Reasoning Qwen3.5 Plus leads
Qwen3.5 Plus: 32.8 (#74), Sonar: 21.1 (#227)
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| Chess Puzzles | 22% | — |
| LiveBench Reasoning | — | 46.3% |
| Mystery Game Puzzles | 17% | — |
| DTBench | 80.5% | — |
| LiveBench Data Analysis | — | 37.9% |
| LMCA | 36.4% | — |
| Epoch Capabilities Index | 146.78 | — |
| LiveBench | — | 46.9% |
Math Qwen3.5 Plus leads
Qwen3.5 Plus: 49.6 (#61), Sonar: 33.7 (#200)
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 86.7% | — |
| LiveBench Math | — | 41.6% |
| FrontierMath (Feb 2025 set) | 21% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |
Knowledge Not comparable
Qwen3.5 Plus: 46.0 (#83), Sonar: —
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| GPQA Diamond | 84.8% | — |
| SimpleQA Verified | 25.4% | — |
| Vectara Hallucination Rate | 10.7% | — |
Instruction Following Not comparable
Qwen3.5 Plus: —, Sonar: 71.4 (#150)
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
Long Context Not comparable
Qwen3.5 Plus: 43.0 (#113), Sonar: —
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| CL-bench | 19.8% | — |
| CL-bench Life | 12.4% | — |
Writing & Preference Not comparable
Qwen3.5 Plus: —, Sonar: 52.6 (#167)
| Benchmark | Qwen3.5 Plus | Sonar |
|---|---|---|
| LiveBench Language | — | 44.1% |
Frequently asked questions
Is Qwen3.5 Plus better than Sonar?
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 38.5 on the Noometry Index.
Which is cheaper, Qwen3.5 Plus or Sonar?
Qwen3.5 Plus is cheaper. It lists at $0.40 per million input tokens and $2.40 per million output tokens; Sonar lists at $1 and $1.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 128K.
How many benchmarks do Qwen3.5 Plus and Sonar share?
0 benchmarks have published results for both models. Qwen3.5 Plus has 15 scored results on Noometry and Sonar has 7.