Model comparison
Hy3 vs Mercury 2.5
Hy3 is the stronger model overall, scoring 44.2 to 33.5 on the Noometry Index. Mercury 2.5 costs 2.1× less per token, which makes it the better buy when Hy3's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
TencentSummary
- The widest gap is in math, where Hy3 leads 40.1 to 23.3.
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $0.0825 / $0.33 for Hy3.
- Hy3 accepts more context: 262K tokens versus 260K.
- Hy3 has downloadable open weights; the other is API-only.
Side by side
| Hy3 | Mercury 2.5 | |
|---|---|---|
| Provider | Tencent | Inception |
| Noometry Index | 44.2 | 33.5 |
| Released | 2026-07-06 | 2026-09-08 |
| Weights | Open | Proprietary |
| Context window | 262K | 260K |
| Max output | 128K | 66K |
| Input $ / M tokens | $0.0825 | $0.04 |
| Output $ / M tokens | $0.33 | $0.15 |
| Results tracked | 19 | 4 |
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Category by category
Coding Hy3 leads
Hy3: 46.8 (#63), Mercury 2.5: 39.5 (#156)
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| LMArena WebDev | 1508 | — |
| SciCode | — | 38.5% |
| LMArena Coding | 1464 | — |
| ALE-Bench | — | 301.65 |
Reasoning Hy3 leads
Hy3: 26.1 (#136), Mercury 2.5: 22.4 (#193)
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| NYT Connections (extended) | 41.2% | — |
| CritPt | — | 0% |
| LMArena Hard Prompts | 1447 | — |
Math Hy3 leads
Hy3: 40.1 (#93), Mercury 2.5: 23.3 (#272)
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
| LMArena Math | 1475 | — |
Knowledge Not comparable
Hy3: 40.8 (#114), Mercury 2.5: —
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| LMArena Expert | 1460 | — |
Multilingual Not comparable
Hy3: 53.5 (#65), Mercury 2.5: —
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1426 | — |
| LMArena Chinese | 1493 | — |
| LMArena French | 1461 | — |
| LMArena German | 1439 | — |
| LMArena Japanese | 1392 | — |
| LMArena Korean | 1395 | — |
| LMArena Russian | 1432 | — |
| LMArena Spanish | 1456 | — |
Instruction Following Not comparable
Hy3: 75.1 (#70), Mercury 2.5: —
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1426 | — |
Long Context Not comparable
Hy3: 44.1 (#75), Mercury 2.5: —
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1442 | — |
Writing & Preference Not comparable
Hy3: 62.2 (#81), Mercury 2.5: —
| Benchmark | Hy3 | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1439 | — |
| LMArena Creative Writing | 1402 | — |
| LMArena Multi-Turn | 1436 | — |
Frequently asked questions
Is Hy3 better than Mercury 2.5?
Hy3 is the stronger model overall, scoring 44.2 to 33.5 on the Noometry Index. Mercury 2.5 costs 2.1× less per token, which makes it the better buy when Hy3's lead doesn't matter for your workload.
Which is cheaper, Hy3 or Mercury 2.5?
Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; Hy3 lists at $0.0825 and $0.33.
Is Hy3 or Mercury 2.5 better for coding?
Hy3 scores higher on coding benchmarks: 46.8 versus 39.5 in the Noometry coding category.
Which has the bigger context window?
Hy3 does, with 262K tokens against 260K.
How many benchmarks do Hy3 and Mercury 2.5 share?
0 benchmarks have published results for both models. Hy3 has 19 scored results on Noometry and Mercury 2.5 has 4.