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Claude Opus 5 vs Hy4 preview

Claude Opus 5 leads the LLM Stats Score 55.4 to 51.1.

Anthropic · Tencent · Updated for 2026

Which is better?

Claude Opus 5 leads the overall LLM Stats Score 55.4 to 51.1, ranking #3 overall.

The models split the 2 individual benchmarks reported for both models evenly.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 5

  • overall performance matters — it scores 55.4 and ranks #3 on LLM Stats

Choose Hy4 preview

  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Opus 5
Anthropic
Hy4 preview
Tencent
Core performance indexes
LLM Stats Score
55.4
#3
51.1
#14
Reasoning
54.3
#4
50.7
#11
Coding
42.3
#8
39.8
#12
Agents
39.9
#6
36.3
#14
Cost, coverage & limits
Benchmark wins
1 of 2
1 of 2
Input price
$5.00 / M
— / M
Output price
$25.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 5
Hy4 preview
Tool use
27.8#20
31.1#10
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

13 reported for Claude Opus 5 · 32 for Hy4 preview

2 shared

Claude Opus 5 outperforms in 1 benchmarks (BioMysteryBench), while Hy4 preview is better at 1 benchmark (AutomationBench).

Both models are evenly matched across the benchmarks.

Tue Sep 08 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Opus 5 specifies input context (1,000,000 tokens). Only Claude Opus 5 specifies output context (128,000 tokens).

Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
Tencent
Hy4 preview
Input- tokens
Output- tokens
Tue Sep 08 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 5 supports multimodal inputs, whereas Hy4 preview does not.

Claude Opus 5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 5

Text
Images
Audio
Video

Hy4 preview

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 5 is licensed under a proprietary license, while Hy4 preview uses Apache 2.0.

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

Claude Opus 5

Proprietary

Closed source

Hy4 preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 5 was released on 2026-07-24, while Hy4 preview was released on 2026-08-28.

Hy4 preview is 1 month newer than Claude Opus 5.

Claude Opus 5

Jul 24, 2026

1 months ago

Hy4 preview

Aug 28, 2026

1 weeks ago

1mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Opus 5 and Hy4 preview side-by-side, then vote on the output you prefer.

Claude Opus 5
✓ Preferred
Hy4 preview
Open in Playground

FAQ

Common questions about Claude Opus 5 vs Hy4 preview.

Which is better, Claude Opus 5 or Hy4 preview?

Claude Opus 5 leads the LLM Stats Score 55.4 to 51.1. Claude Opus 5 is made by Anthropic and Hy4 preview is made by Tencent. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 5 compare to Hy4 preview in benchmarks?

Claude Opus 5 scores BrowseComp: 90.8%, BioMysteryBench: 90.1%, OSWorld 2.0: 70.6%, DeepSWE 1.1: 68.8%, Humanity's Last Exam: 64.7%. Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%.

What are the context window sizes for Claude Opus 5 and Hy4 preview?

Claude Opus 5 supports 1.0M tokens and Hy4 preview 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 Opus 5 and Hy4 preview?

Key differences include LLM Stats Score (55.4 vs 51.1), multimodal support (yes vs no), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5 and Hy4 preview?

Claude Opus 5 is developed by Anthropic and Hy4 preview is developed by Tencent.

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