Model Comparison

Claude Sonnet 4.5 vs Hy3Which is better in 2026?

Hy3 significantly outperforms across most benchmarks.

Verdict: Claude Sonnet 4.5 vs Hy3 — which is better?

Claude Sonnet 4.5 (by Anthropic) and Hy3 (by Tencent) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Sonnet 4.5 outperforms in 0 benchmarks, while Hy3 is better at 1 benchmark (GPQA). Hy3 significantly outperforms across most benchmarks.

Choose Claude Sonnet 4.5 if…

  • you want predictable pricing at $3.00/M input and $15.00/M output

Choose Hy3 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Sonnet 4.5 outperforms in 0 benchmarks, while Hy3 is better at 1 benchmark (GPQA).

Hy3 significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Claude Sonnet 4.5 specifies input context (200,000 tokens). Only Claude Sonnet 4.5 specifies output context (64,000 tokens).

Anthropic
Claude Sonnet 4.5
Input200,000 tokens
Output64,000 tokens
Tencent
Hy3
Input- tokens
Output- tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Sonnet 4.5 supports multimodal inputs, whereas Hy3 does not.

Claude Sonnet 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 4.5

Text
Images
Audio
Video

Hy3

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 4.5 is licensed under a proprietary license, while Hy3 uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Sonnet 4.5

Proprietary

Closed source

Hy3

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Sonnet 4.5 was released on 2025-09-29, while Hy3 was released on 2026-07-06.

Hy3 is 9 months newer than Claude Sonnet 4.5.

Claude Sonnet 4.5

Sep 29, 2025

9 months ago

Hy3

Jul 6, 2026

2 weeks ago

9mo newer

Knowledge Cutoff

When training data ends

Claude Sonnet 4.5 has a documented knowledge cutoff of 2025-01-31, while Hy3's cutoff date is not specified.

We can confirm Claude Sonnet 4.5's training data extends to 2025-01-31, but cannot make a direct comparison without Hy3's cutoff date.

Claude Sonnet 4.5

Jan 2025

Hy3

—

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Tencent
Has open weights
Higher GPQA score (90.4% vs 83.4%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Sonnet 4.5 and Hy3 side-by-side, then vote on the output you prefer.

Claude Sonnet 4.5
✓ Preferred
Hy3
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4.5
Tencent
Hy3

FAQ

Common questions about Claude Sonnet 4.5 vs Hy3.

Which is better, Claude Sonnet 4.5 or Hy3?

Hy3 significantly outperforms across most benchmarks. Claude Sonnet 4.5 is made by Anthropic and Hy3 is made by Tencent. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Sonnet 4.5 compare to Hy3 in benchmarks?

Claude Sonnet 4.5 scores MMMLU: 89.1%, AIME 2025: 87.0%, TAU-bench Retail: 86.2%, GPQA: 83.4%, MMMUval: 77.8%. Hy3 scores DeepSearchQA: 91.0%, GPQA: 90.4%, IMO-AnswerBench: 90.0%, BrowseComp: 84.2%, MCP Atlas: 79.1%.

What are the context window sizes for Claude Sonnet 4.5 and Hy3?

Claude Sonnet 4.5 supports 200K tokens and Hy3 supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Sonnet 4.5 and Hy3?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 4.5 and Hy3?

Claude Sonnet 4.5 is developed by Anthropic and Hy3 is developed by Tencent.

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