# Claude Sonnet 4.5 vs Hy3 Preview

> Side-by-side benchmark comparison for Claude Sonnet 4.5 and Hy3 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-4-5-vs-hy3-preview
- Last updated: September 23, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.6

## Quick Verdict

Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. Hy3 Preview only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 4.5 leads overall 47.86 to 45.32.
- The biggest single benchmark swing is Gert Labs in Agentic, with scores of 48.51% and 36.91%.
- Hy3 Preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Hy3 Preview also has the larger context window at 256K.

## Model Snapshot

| Property | Claude Sonnet 4.5 | Hy3 Preview |
|----------|----------|----------|
| Creator | Anthropic | Tencent |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 256K |
| Overall Score | 47.86 | 45.32 |
| Benchmarks Covered | 11 | 6 |
| Pricing (input/output) | $3.00 / $15.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: 26.7 (Estimated · #75/105)
- Hy3 Preview public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Hy3 Preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 50% | 54.4% | Hy3 Preview |
| OSWorld-Verified | 61.4% | Coming soon | Coming soon |
| VITA-Bench | 17.0% | Coming soon | Coming soon |
| Gert Labs | 48.51% | 36.91% | Claude Sonnet 4.5 |
| JobBench | 27.7% | Coming soon | Coming soon |

### Coding

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: Coming soon
- Hy3 Preview public-lane score: 33.3 (Estimated · #85/135)

| Benchmark | Claude Sonnet 4.5 | Hy3 Preview | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.2% | 74.4% | Claude Sonnet 4.5 |
| Terminal-Bench 2.0 | Coming soon | 54.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: 19.1 (Unranked · 1 rankable row)
- Hy3 Preview public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Hy3 Preview | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 13.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: Coming soon
- Hy3 Preview public-lane score: 39.1 (Estimated · #93/160)

| Benchmark | Claude Sonnet 4.5 | Hy3 Preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 83.4% | 87.2% | Hy3 Preview |
| GPQA-D | Coming soon | 87.2% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: Coming soon
- Hy3 Preview public-lane score: 46.9 (#86/124)

### Mathematics

- Winner: Not comparable
- Claude Sonnet 4.5 public-lane score: 34.6 (Unranked · 2 rankable rows)
- Hy3 Preview public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Hy3 Preview | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 87% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 13.495% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.167% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Sonnet 4.5 or Hy3 Preview?

Claude Sonnet 4.5 is ahead overall on BenchLM right now.

### How many benchmarks does Claude Sonnet 4.5 cover on BenchLM?

Claude Sonnet 4.5 currently has 11 sourced benchmark scores on BenchLM.

### How many benchmarks does Hy3 Preview cover on BenchLM?

Hy3 Preview currently has 6 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 4.5 vs Claude Sonnet 4.5 Thinking](/compare/claude-sonnet-4-5-vs-claude-sonnet-4-5-thinking)
- [Hy3 Preview vs Claude Sonnet 4.5 Thinking](/compare/claude-sonnet-4-5-thinking-vs-hy3-preview)
- [Claude Sonnet 4.5 vs Hy3](/compare/claude-sonnet-4-5-vs-hy3)
- [Hy3 Preview vs Hy3](/compare/hy3-vs-hy3-preview)

## Explore More

- [Claude Sonnet 4.5 profile](/models/claude-sonnet-4-5)
- [Hy3 Preview profile](/models/hy3-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)