Model comparison
Hy4 preview vs Sonar
Hy4 preview is the stronger model overall, scoring 44.6 to 37.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Tencent
PerplexitySummary
- The widest gap is in math, where Hy4 preview leads 54.5 to 31.3.
- Sonar is cheaper at $1 / $1 per million input/output tokens, against $0.83 / $2.50 for Hy4 preview.
- Hy4 preview accepts more context: 1.05M tokens versus 128K.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| Hy4 preview | Sonar | |
|---|---|---|
| Provider | Tencent | Perplexity |
| Noometry Index | 44.6 | 37.8 |
| Released | 2026-08-28 | 2024-01-01 |
| Weights | Open | Proprietary |
| Context window | 1.05M | 128K |
| Max output | 64K | 4K |
| Input $ / M tokens | $0.83 | $1 |
| Output $ / M tokens | $2.50 | $1 |
| Results tracked | 3 | 7 |
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Category by category
Coding Hy4 preview leads
Hy4 preview: 51.4 (#36), Sonar: 35.1 (#217)
| Benchmark | Hy4 preview | Sonar |
|---|---|---|
| LMArena WebDev | 1633 | — |
| LiveBench Coding | — | 35.1% |
Reasoning Hy4 preview leads
Hy4 preview: 30.6 (#75), Sonar: 20.3 (#221)
| Benchmark | Hy4 preview | Sonar |
|---|---|---|
| NYT Connections (extended) | 68.2% | — |
| LiveBench Reasoning | — | 46.3% |
| LiveBench Data Analysis | — | 37.9% |
| LiveBench | — | 46.9% |
Math Hy4 preview leads
Hy4 preview: 54.5 (#37), Sonar: 31.3 (#197)
| Benchmark | Hy4 preview | Sonar |
|---|---|---|
| ProofBench | 75% | — |
| LiveBench Math | — | 41.6% |
Instruction Following Not comparable
Hy4 preview: —, Sonar: 71.5 (#146)
| Benchmark | Hy4 preview | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
Writing & Preference Not comparable
Hy4 preview: —, Sonar: 52.6 (#166)
| Benchmark | Hy4 preview | Sonar |
|---|---|---|
| LiveBench Language | — | 44.1% |
Frequently asked questions
Is Hy4 preview better than Sonar?
Hy4 preview is the stronger model overall, scoring 44.6 to 37.8 on the Noometry Index.
Which is cheaper, Hy4 preview or Sonar?
Sonar is cheaper. It lists at $1 per million input tokens and $1 per million output tokens; Hy4 preview lists at $0.83 and $2.50.
Is Hy4 preview or Sonar better for coding?
Hy4 preview scores higher on coding benchmarks: 51.4 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 128K.
How many benchmarks do Hy4 preview and Sonar share?
0 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and Sonar has 7.