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Hy4 preview vs Kimi K2.8 Preview

Comparing Hy4 preview and Kimi K2.8 Preview across benchmarks, pricing, and capabilities.

Tencent · Moonshot AI · Updated for 2026

Which is better?

Hy4 preview and Kimi K2.8 Preview trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose Hy4 preview

  • you need open weights you can self-host or fine-tune

Choose Kimi K2.8 Preview

  • you want the most recent training data — it shipped Sep 2026

At a glance

The differences that matter most.

Hy4 preview
Tencent
Kimi K2.8 Preview
Moonshot AI
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
1,048,576

Individual benchmarks

32 reported for Hy4 preview · 0 for Kimi K2.8 Preview

No common benchmarks found

Hy4 preview and Kimi K2.8 Previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Kimi K2.8 Preview specifies input context (1,048,576 tokens).

Tencent
Hy4 preview
Input- tokens
Output- tokens
Moonshot AI
Kimi K2.8 Preview
Input1,048,576 tokens
Output- tokens
Sun Sep 20 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Kimi K2.8 Preview supports multimodal inputs, whereas Hy4 preview does not.

Kimi K2.8 Preview can handle both text and other forms of data like images, making it suitable for multimodal applications.

Hy4 preview

Text
Images
Audio
Video

Kimi K2.8 Preview

Text
Images
Audio
Video

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while Kimi K2.8 Preview 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

Kimi K2.8 Preview

Proprietary

Closed source

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while Kimi K2.8 Preview was released on 2026-09-11.

Kimi K2.8 Preview is 0 month newer than Hy4 preview.

Hy4 preview

Aug 28, 2026

3 weeks ago

Kimi K2.8 Preview

Sep 11, 2026

1 weeks ago

2w 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 Hy4 preview and Kimi K2.8 Preview side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
Kimi K2.8 Preview
Open in Playground

FAQ

Common questions about Hy4 preview vs Kimi K2.8 Preview.

Which is better, Hy4 preview or Kimi K2.8 Preview?

Hy4 preview (Tencent) and Kimi K2.8 Preview (Moonshot AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Hy4 preview compare to Kimi K2.8 Preview 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%.

What are the context window sizes for Hy4 preview and Kimi K2.8 Preview?

Hy4 preview supports an unknown number of tokens and Kimi K2.8 Preview 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 Kimi K2.8 Preview?

Key differences include 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 Kimi K2.8 Preview?

Hy4 preview is developed by Tencent and Kimi K2.8 Preview is developed by Moonshot AI.

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