Model comparison
Hy4 preview vs Qwen3.5-Flash
Hy4 preview is the stronger model overall, scoring 45.3 to 42.5 on the Noometry Index. Qwen3.5-Flash costs 6.4× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
Tencent
Alibaba (Qwen)Summary
- They share 1 benchmark with published results for both. Hy4 preview scores higher in 2 categories and Qwen3.5-Flash in 1 category; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Hy4 preview leads 55.7 to 37.4.
- Qwen3.5-Flash is cheaper at $0.10 / $0.40 per million input/output tokens, against $0.75 / $2.25 for Hy4 preview.
- Hy4 preview accepts more context: 1.05M tokens versus 1M.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| Hy4 preview | Qwen3.5-Flash | |
|---|---|---|
| Provider | Tencent | Alibaba (Qwen) |
| Noometry Index | 45.3 | 42.5 |
| Released | 2026-08-28 | 2026-02-23 |
| Weights | Open | Proprietary |
| Context window | 1.05M | 1M |
| Max output | 64K | 66K |
| Input $ / M tokens | $0.75 | $0.10 |
| Output $ / M tokens | $2.25 | $0.40 |
| Results tracked | 3 | 32 |
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Category by category
Coding Hy4 preview leads
Hy4 preview: 51.6 (#38), Qwen3.5-Flash: 34.2 (#242)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| LMArena WebDev | 1632 | 1244 |
| LMArena Coding | — | 1412 |
| ALE-Bench | — | 221.8 |
Agentic & Tool Use Not comparable
Hy4 preview: —, Qwen3.5-Flash: —
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| Vending-Bench 2 | — | 462.69 |
Reasoning Qwen3.5-Flash leads
Hy4 preview: 31.9 (#79), Qwen3.5-Flash: 33.7 (#72)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| NYT Connections (extended) | 68.2% | — |
| Chess Puzzles | — | 21% |
| LMArena Hard Prompts | — | 1403 |
| Mystery Game Puzzles | — | 20% |
| DTBench | — | 82.9% |
| LMCA | — | 29.1% |
| Epoch Capabilities Index | — | 143.98 |
Math Hy4 preview leads
Hy4 preview: 55.7 (#42), Qwen3.5-Flash: 37.4 (#158)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 18.2% |
| OTIS Mock AIME 2024-2025 | — | 84.4% |
| ProofBench | 75% | — |
| LMArena Math | — | 1407 |
| FrontierMath (Feb 2025 set) | — | 6.2% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Not comparable
Hy4 preview: —, Qwen3.5-Flash: 43.2 (#93)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| GPQA Diamond | — | 82.3% |
| SimpleQA Verified | — | 20.3% |
| Vectara Hallucination Rate | — | 10.5% |
| LMArena Expert | — | 1407 |
Multilingual Not comparable
Hy4 preview: —, Qwen3.5-Flash: 50.5 (#121)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| LMArena Non-English | — | 1385 |
| LMArena Chinese | — | 1446 |
| LMArena French | — | 1412 |
| LMArena German | — | 1390 |
| LMArena Japanese | — | 1368 |
| LMArena Korean | — | 1344 |
| LMArena Russian | — | 1379 |
| LMArena Spanish | — | 1400 |
Instruction Following Not comparable
Hy4 preview: —, Qwen3.5-Flash: 72.6 (#139)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| LMArena Instruction Following | — | 1374 |
Long Context Not comparable
Hy4 preview: —, Qwen3.5-Flash: 42.4 (#124)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| LMArena Longer Query | — | 1392 |
Writing & Preference Not comparable
Hy4 preview: —, Qwen3.5-Flash: 57.9 (#122)
| Benchmark | Hy4 preview | Qwen3.5-Flash |
|---|---|---|
| LMArena Text | — | 1397 |
| LMArena Creative Writing | — | 1343 |
| LMArena Multi-Turn | — | 1393 |
Frequently asked questions
Is Hy4 preview better than Qwen3.5-Flash?
Hy4 preview is the stronger model overall, scoring 45.3 to 42.5 on the Noometry Index. Qwen3.5-Flash costs 6.4× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Which is cheaper, Hy4 preview or Qwen3.5-Flash?
Qwen3.5-Flash is cheaper. It lists at $0.10 per million input tokens and $0.40 per million output tokens; Hy4 preview lists at $0.75 and $2.25.
Is Hy4 preview or Qwen3.5-Flash better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 34.2 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 1M.
How many benchmarks do Hy4 preview and Qwen3.5-Flash share?
1 benchmark has published results for both models. Hy4 preview has 3 scored results on Noometry and Qwen3.5-Flash has 32.