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Claude Opus 4.8 vs Hy4 preview

Claude Opus 4.8 and Hy4 preview are closely matched at 51.5 and 51.5 on the LLM Stats Score.

Anthropic · Tencent · Updated for 2026

Which is better?

Claude Opus 4.8 and Hy4 preview are closely matched on the overall LLM Stats Score at 51.5 and 51.5.

In the 7 individual benchmarks reported for both models, Claude Opus 4.8 wins 4; this is a narrower head-to-head signal than the composite indexes.

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

Choose Claude Opus 4.8

  • you value its reported benchmark strengths — it wins 4 of 7 exact shared results

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 4.8
Anthropic
Hy4 preview
Tencent
Core performance indexes
LLM Stats Score
51.5
#11
51.5
#10
Reasoning
50.9
#9
51.2
#8
Coding
42.3
#8
40.9
#10
Agents
35.5
#15
37.1
#11
Cost, coverage & limits
Benchmark wins
4 of 7
3 of 7
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

2 shared
Index
Claude Opus 4.8
Hy4 preview
Math
39.4#18
40.3#12
Tool use
30.6#14
32.6#7
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

26 reported for Claude Opus 4.8 · 32 for Hy4 preview

7 shared

Claude Opus 4.8 outperforms in 4 benchmarks (CyberGym, GPQA, SWE-bench Multilingual, SWE-Bench Pro), while Hy4 preview is better at 2 benchmarks (MCP Atlas, Toolathlon).

Claude Opus 4.8 has a slight edge in benchmark performance.

Mon Aug 31 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 4.8 specifies input context (1,000,000 tokens). Only Claude Opus 4.8 specifies output context (128,000 tokens).

Anthropic
Claude Opus 4.8
Input1,000,000 tokens
Output128,000 tokens
Tencent
Hy4 preview
Input- tokens
Output- tokens
Mon Aug 31 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Opus 4.8 supports multimodal inputs, whereas Hy4 preview does not.

Claude Opus 4.8 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.8

Text
Images
Audio
Video

Hy4 preview

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.8 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 4.8

Proprietary

Closed source

Hy4 preview

Apache 2.0

Open weights

Release Timeline

When each model was launched

Claude Opus 4.8 was released on 2026-05-28, while Hy4 preview was released on 2026-08-28.

Hy4 preview is 3 months newer than Claude Opus 4.8.

Claude Opus 4.8

May 28, 2026

3 months ago

Hy4 preview

Aug 28, 2026

3 days ago

3mo 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 4.8 and Hy4 preview side-by-side, then vote on the output you prefer.

Claude Opus 4.8
✓ Preferred
Hy4 preview
Open in Playground

FAQ

Common questions about Claude Opus 4.8 vs Hy4 preview.

Which is better, Claude Opus 4.8 or Hy4 preview?

Claude Opus 4.8 and Hy4 preview are closely matched on the LLM Stats Score at 51.5 and 51.5. Claude Opus 4.8 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 4.8 compare to Hy4 preview in benchmarks?

Claude Opus 4.8 scores GPQA: 93.6%, DeepSearchQA: 93.1%, CharXiv-R: 89.9%, SWE-Bench Verified: 88.6%, ScreenSpot Pro: 87.9%. 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 4.8 and Hy4 preview?

Claude Opus 4.8 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 4.8 and Hy4 preview?

Key differences include LLM Stats Score (51.5 vs 51.5), 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 4.8 and Hy4 preview?

Claude Opus 4.8 is developed by Anthropic and Hy4 preview is developed by Tencent.

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