# GPT-5.5 vs Hy3

> GPT-5.5 is the stronger model overall, scoring 63.4 to 44.2 on the Noometry Index. Hy3 costs 49× less per token, which makes it the better buy when GPT-5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-5-vs-hy3
- Last updated: 2026-10-11
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. GPT-5.5 scores higher in 8 categories and Hy3 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 leads 72.8 to 26.1.
- The biggest single-benchmark swing is NYT Connections (extended): 96.2% for GPT-5.5 and 41.2% for Hy3.
- Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $5 / $30 for GPT-5.5.
- GPT-5.5 accepts more context: 1.05M tokens versus 262K.
- Hy3 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 | Hy3 |
|---|---|---|
| Provider | OpenAI | Tencent |
| Noometry Index | 63.4 | 44.2 |
| Rank | 9 | 79 |
| Context | 1.05M | 262K |
| Input $/M | $5 | $0.13 |
| Output $/M | $30 | $0.53 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5: 58.2 (#17)
- Hy3: 46.8 (#63)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena WebDev | 1513 | 1508 |
| LMArena Coding | 1494 | 1464 |
| SWE-bench Verified | 80.6% | — |
| DeepSWE | 67% | — |
| FrontierCode | 43% | — |
| SciCode | 56.1% | — |
| GSO | 40.2% | — |
| WeirdML | 84.9% | — |
| MirrorCode | 10% | — |
| ALE-Bench | 1,943 | — |

## Agentic & Tool Use

- GPT-5.5: 50.7 (#6)
- Hy3: —

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| Terminal-Bench | 84.7% | — |
| APEX-Agents | 55.1% | — |
| OSWorld 2.0 | 13% | — |
| Remote Labor Index | 6.3% | — |
| τ²-bench Banking | 44.6% | — |
| DeepResearch Bench | 54% | — |
| PostTrainBench | 27.2% | — |
| ExploitBench | 47.4% | — |
| GBAEval | 53.2% | — |
| GDP.pdf | 26% | — |
| LMArena Search | 1242 | — |
| Vending-Bench 2 | 7,524 | — |

## Reasoning

- GPT-5.5: 72.8 (#11)
- Hy3: 26.1 (#136)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| NYT Connections (extended) | 96.2% | 41.2% |
| LMArena Hard Prompts | 1489 | 1447 |
| ARC-AGI-2 | 85% | — |
| SimpleBench | 69% | — |
| Kagi LLM Benchmark | 88.8% | — |
| ARC-AGI-1 | 95% | — |
| CritPt | 27.1% | — |
| Chess Puzzles | 54% | — |
| EBR-Bench | 34.3% | — |
| Mystery Game Puzzles | 56% | — |
| DTBench | 96% | — |
| LMCA | 54.3% | — |
| Surface Evolver Bench | 88.1% | — |
| Bench to the Future 3 | 0.14 | — |
| Epoch Capabilities Index | 159.1 | — |
| ForecastBench | 60.6 | — |

## Math

- GPT-5.5: 81.7 (#11)
- Hy3: 40.1 (#93)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Math | 1486 | 1475 |
| FrontierMath (Tiers 1-3) | 85.3% | — |
| FrontierMath Tier 4 | 72.5% | — |
| MathArena Final-Answer Competitions | 94.3% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 50% | — |
| FrontierMath (Feb 2025 set) | 51.7% | — |
| FrontierMath Erdős | 0% | — |
| FrontierMath Tier 4 (v1) | 35.4% | — |

## Knowledge

- GPT-5.5: 64.4 (#17)
- Hy3: 40.8 (#114)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Expert | 1508 | 1460 |
| GPQA Diamond | 94% | — |
| SimpleQA Verified | 63% | — |
| Vectara Hallucination Rate | 9.3% | — |

## Multimodal

- GPT-5.5: 46.9 (#12)
- Hy3: —

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Vision | 1297 | — |
| Blueprint-Bench 2 | 36.2% | — |
| Furniture Assembly | 44.2% | — |
| LMArena Document | 1486 | — |

## Multilingual

- GPT-5.5: 56.4 (#20)
- Hy3: 53.5 (#65)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Non-English | 1467 | 1426 |
| LMArena Chinese | 1533 | 1493 |
| LMArena French | 1486 | 1461 |
| LMArena German | 1480 | 1439 |
| LMArena Japanese | 1498 | 1392 |
| LMArena Korean | 1460 | 1395 |
| LMArena Russian | 1473 | 1432 |
| LMArena Spanish | 1468 | 1456 |

## Instruction Following

- GPT-5.5: 77.5 (#18)
- Hy3: 75.1 (#70)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Instruction Following | 1479 | 1426 |

## Long Context

- GPT-5.5: 48.3 (#12)
- Hy3: 44.1 (#75)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Longer Query | 1484 | 1442 |
| CL-bench Life | 22.2% | — |

## Writing & Preference

- GPT-5.5: 72.7 (#13)
- Hy3: 62.2 (#81)

| Benchmark | GPT-5.5 | Hy3 |
|---|---|---|
| LMArena Text | 1472 | 1439 |
| LMArena Creative Writing | 1455 | 1402 |
| LMArena Multi-Turn | 1476 | 1436 |
| EQ-Bench Creative Writing | 1844 | — |
| EQ-Bench 4 | 1315 | — |

## FAQ

### Is GPT-5.5 better than Hy3?

GPT-5.5 is the stronger model overall, scoring 63.4 to 44.2 on the Noometry Index. Hy3 costs 49× less per token, which makes it the better buy when GPT-5.5's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.5 or Hy3?

Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; GPT-5.5 lists at $5 and $30.

### Is GPT-5.5 or Hy3 better for coding?

GPT-5.5 scores higher on coding benchmarks: 58.2 versus 46.8 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.5 does, with 1.05M tokens against 262K.

### How many benchmarks do GPT-5.5 and Hy3 share?

19 benchmarks have published results for both models. GPT-5.5 has 71 scored results on Noometry and Hy3 has 19.