Model comparison
Hy4 preview vs Mercury
Hy4 preview is the stronger model overall, scoring 45.3 to 37.6 on the Noometry Index.
Last verified . 0 shared benchmarks.
TencentSummary
- The widest gap is in reasoning, where Hy4 preview leads 31.9 to 17.5.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| Hy4 preview | Mercury | |
|---|---|---|
| Provider | Tencent | Inception |
| Noometry Index | 45.3 | 37.6 |
| Released | 2026-08-28 | — |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 64K | — |
| Input $ / M tokens | $0.75 | — |
| Output $ / M tokens | $2.25 | — |
| Results tracked | 3 | 9 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Hy4 preview leads
Hy4 preview: 51.6 (#38), Mercury: 38.7 (#170)
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena WebDev | 1632 | — |
| LMArena Coding | — | 1322 |
Reasoning Hy4 preview leads
Hy4 preview: 31.9 (#79), Mercury: 17.5 (#293)
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| Kagi LLM Benchmark | — | 21.6% |
| NYT Connections (extended) | 68.2% | — |
| LMArena Hard Prompts | — | 1285 |
Math Not comparable
Hy4 preview: 55.7 (#42), Mercury: —
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| ProofBench | 75% | — |
Multilingual Not comparable
Hy4 preview: —, Mercury: 41.6 (#206)
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Non-English | — | 1260 |
Instruction Following Not comparable
Hy4 preview: —, Mercury: 65.2 (#224)
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Instruction Following | — | 1239 |
Long Context Not comparable
Hy4 preview: —, Mercury: 38.4 (#198)
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Longer Query | — | 1266 |
Writing & Preference Not comparable
Hy4 preview: —, Mercury: 46.2 (#221)
| Benchmark | Hy4 preview | Mercury |
|---|---|---|
| LMArena Text | — | 1282 |
| LMArena Creative Writing | — | 1191 |
| LMArena Multi-Turn | — | 1282 |
Frequently asked questions
Is Hy4 preview better than Mercury?
Hy4 preview is the stronger model overall, scoring 45.3 to 37.6 on the Noometry Index.
Is Hy4 preview or Mercury better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 38.7 in the Noometry coding category.
How many benchmarks do Hy4 preview and Mercury share?
0 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and Mercury has 9.