The AI arena is free today

Open Superagent

Hy4 preview vs Qwen3.8 Flash

Hy4 preview and Qwen3.8 Flash are closely matched at 51.5 and 49.6 on the LLM Stats Score.

Tencent · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Hy4 preview and Qwen3.8 Flash are closely matched on the overall LLM Stats Score at 51.5 and 49.6.

In the 7 individual benchmarks reported for both models, Hy4 preview wins 6; 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 Hy4 preview

  • you value its reported benchmark strengths — it wins 6 of 7 exact shared results
  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

Choose Qwen3.8 Flash

  • you want predictable pricing at $0.15/M input and $0.47/M output

At a glance

The differences that matter most.

Hy4 preview
Tencent
Qwen3.8 Flash
Alibaba Cloud / Qwen Team
Core performance indexes
LLM Stats Score
51.5
#10
49.6
#16
Reasoning
51.2
#8
49.2
#16
Coding
40.9
#10
36.6
#20
Agents
37.1
#11
35.5
#14
Cost, coverage & limits
Benchmark wins
6 of 7
1 of 7
Input price
— / M
$0.15 / M
Output price
— / M
$0.47 / M
Context window
—
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Hy4 preview
Qwen3.8 Flash
Math
40.3#12
32.6#55
Tool use
32.6#7
31.6#10
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

32 reported for Hy4 preview · 22 for Qwen3.8 Flash

7 shared

Hy4 preview outperforms in 6 benchmarks (GPQA, Job Bench, NL2Repo, SWE-bench Multilingual, SWE-Bench Pro, Toolathlon), while Qwen3.8 Flash is better at 1 benchmark (Agents' Last Exam).

Hy4 preview significantly outperforms across most benchmarks.

Mon Aug 31 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Model Size

Parameter count comparison

645.0B diff

Hy4 preview has 645.0B more parameters than Qwen3.8 Flash, making it 516.0% larger.

Tencent
Hy4 preview
770.0Bparameters
Alibaba Cloud / Qwen Team
Qwen3.8 Flash
125.0Bparameters
770.0B
Hy4 preview
125.0B
Qwen3.8 Flash

Context Window

Maximum input and output token capacity

Only Qwen3.8 Flash specifies input context (1,000,000 tokens). Only Qwen3.8 Flash specifies output context (131,072 tokens).

Tencent
Hy4 preview
Input- tokens
Output- tokens
Alibaba Cloud / Qwen Team
Qwen3.8 Flash
Input1,000,000 tokens
Output131,072 tokens
Mon Aug 31 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Qwen3.8 Flash supports multimodal inputs, whereas Hy4 preview does not.

Qwen3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Hy4 preview

Text
Images
Audio
Video

Qwen3.8 Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while Qwen3.8 Flash uses a proprietary license.

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

Hy4 preview

Apache 2.0

Open weights

Qwen3.8 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while Qwen3.8 Flash was released on 2026-08-26.

Hy4 preview is 0 month newer than Qwen3.8 Flash.

Hy4 preview

Aug 28, 2026

3 days ago

2d newer
Qwen3.8 Flash

Aug 26, 2026

5 days ago

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 Hy4 preview and Qwen3.8 Flash side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
Qwen3.8 Flash
Open in Playground

FAQ

Common questions about Hy4 preview vs Qwen3.8 Flash.

Which is better, Hy4 preview or Qwen3.8 Flash?

Hy4 preview and Qwen3.8 Flash are closely matched on the LLM Stats Score at 51.5 and 49.6. Hy4 preview is made by Tencent and Qwen3.8 Flash is made by Alibaba Cloud / Qwen Team. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Hy4 preview compare to Qwen3.8 Flash in benchmarks?

Hy4 preview scores GPQA: 92.3%, Terminal-Bench 2.1: 85.4%, WideSearch: 83.9%, MCP Atlas: 83.7%, SWE-bench Multilingual: 82.9%. Qwen3.8 Flash scores MathVision: 95.7%, LiveCodeBench v6: 91.9%, GPQA: 91.7%, CharXiv-R: 90.6%, RealWorldQA: 88.5%.

What are the context window sizes for Hy4 preview and Qwen3.8 Flash?

Hy4 preview supports an unknown number of tokens and Qwen3.8 Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Hy4 preview and Qwen3.8 Flash?

Key differences include LLM Stats Score (51.5 vs 49.6), multimodal support (no vs yes), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Hy4 preview and Qwen3.8 Flash?

Hy4 preview is developed by Tencent and Qwen3.8 Flash is developed by Alibaba Cloud / Qwen Team.

Related comparisons