# Claude Sonnet 5.5 vs Hy3

> Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 44.2 on the Noometry Index. Hy3 costs 17× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-hy3
- Last updated: 2026-10-11
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 8 categories and Hy3 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 40.1.
- The biggest single-benchmark swing is NYT Connections (extended): 80.5% for Claude Sonnet 5.5 and 41.2% for Hy3.
- Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 262K.
- Hy3 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| Provider | Anthropic | Tencent |
| Noometry Index | 61.9 | 44.2 |
| Rank | 10 | 79 |
| Context | 1M | 262K |
| Input $/M | $2 | $0.13 |
| Output $/M | $10 | $0.53 |
| Weights | Proprietary | Open |

## Coding

- Claude Sonnet 5.5: 67.3 (#6)
- Hy3: 46.8 (#63)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena WebDev | 1774 | 1508 |
| LMArena Coding | 1513 | 1464 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |

## Agentic & Tool Use

- Claude Sonnet 5.5: 45.0 (#16)
- Hy3: —

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| APEX-Agents | 75.5% | — |

## Reasoning

- Claude Sonnet 5.5: 54.0 (#28)
- Hy3: 26.1 (#136)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| NYT Connections (extended) | 80.5% | 41.2% |
| LMArena Hard Prompts | 1495 | 1447 |
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| Epoch Capabilities Index | 165.03 | — |

## Math

- Claude Sonnet 5.5: 87.9 (#6)
- Hy3: 40.1 (#93)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Math | 1510 | 1475 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 2.9% | — |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#12)
- Hy3: 40.8 (#114)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Expert | 1540 | 1460 |
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |

## Multimodal

- Claude Sonnet 5.5: 51.5 (#6)
- Hy3: —

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |

## Multilingual

- Claude Sonnet 5.5: 55.3 (#30)
- Hy3: 53.5 (#65)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Non-English | 1452 | 1426 |
| LMArena Chinese | 1522 | 1493 |
| LMArena Russian | 1451 | 1432 |
| LMArena French | — | 1461 |
| LMArena German | — | 1439 |
| LMArena Japanese | — | 1392 |
| LMArena Korean | — | 1395 |
| LMArena Spanish | — | 1456 |

## Instruction Following

- Claude Sonnet 5.5: 78.3 (#11)
- Hy3: 75.1 (#70)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Instruction Following | 1495 | 1426 |

## Long Context

- Claude Sonnet 5.5: 45.9 (#28)
- Hy3: 44.1 (#75)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Longer Query | 1498 | 1442 |

## Writing & Preference

- Claude Sonnet 5.5: 66.0 (#40)
- Hy3: 62.2 (#81)

| Benchmark | Claude Sonnet 5.5 | Hy3 |
|---|---|---|
| LMArena Text | 1471 | 1439 |
| LMArena Creative Writing | 1465 | 1402 |
| LMArena Multi-Turn | 1474 | 1436 |

## FAQ

### Is Claude Sonnet 5.5 better than Hy3?

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 44.2 on the Noometry Index. Hy3 costs 17× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Sonnet 5.5 or Hy3?

Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Is Claude Sonnet 5.5 or Hy3 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 46.8 in the Noometry coding category.

### Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 262K.

### How many benchmarks do Claude Sonnet 5.5 and Hy3 share?

14 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Hy3 has 19.