The AI arena is free today

Open Superagent

Hy4 preview vs Kimi-k1.5

Hy4 preview leads the LLM Stats Score 51.5 to 17.4.

Tencent · Moonshot AI · Updated for 2026

Which is better?

Hy4 preview leads the overall LLM Stats Score 51.5 to 17.4, ranking #10 overall.

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

Choose Hy4 preview

  • overall performance matters — it scores 51.5 and ranks #10 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Aug 2026
  • you need open weights you can self-host or fine-tune

Choose Kimi-k1.5

  • you are already invested in the Moonshot AI ecosystem

At a glance

The differences that matter most.

Hy4 preview
Tencent
Kimi-k1.5
Moonshot AI
Core performance indexes
LLM Stats Score
51.5
#10
17.4
#200
Reasoning
51.2
#8
16.6
#199
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
— / M
Output price
— / M
— / M
Context window
—
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Hy4 preview
Kimi-k1.5
Math
40.3#12
20.5#148
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

32 reported for Hy4 preview · 9 for Kimi-k1.5

No common benchmarks found

Hy4 preview and Kimi-k1.5don'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

Input capabilities

Documented input modalities across available providers

Kimi-k1.5 supports multimodal inputs, whereas Hy4 preview does not.

Kimi-k1.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Hy4 preview

Text
Images
Audio
Video

Kimi-k1.5

Text
Images
Audio
Video

License

Usage and distribution terms

Hy4 preview is licensed under Apache 2.0, while Kimi-k1.5 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-k1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Hy4 preview was released on 2026-08-28, while Kimi-k1.5 was released on 2025-01-20.

Hy4 preview is 20 months newer than Kimi-k1.5.

Hy4 preview

Aug 28, 2026

3 days ago

1.6yr newer
Kimi-k1.5

Jan 20, 2025

1.6 years 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 Kimi-k1.5 side-by-side, then vote on the output you prefer.

Hy4 preview
✓ Preferred
Kimi-k1.5
Open in Playground

FAQ

Common questions about Hy4 preview vs Kimi-k1.5.

Which is better, Hy4 preview or Kimi-k1.5?

Hy4 preview leads the LLM Stats Score 51.5 to 17.4. Hy4 preview is made by Tencent and Kimi-k1.5 is made by Moonshot AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Hy4 preview compare to Kimi-k1.5 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%. Kimi-k1.5 scores MATH-500: 96.2%, CLUEWSC: 91.4%, C-Eval: 88.3%, MMLU: 87.4%, IFEval: 87.2%.

What are the main differences between Hy4 preview and Kimi-k1.5?

Key differences include LLM Stats Score (51.5 vs 17.4), 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-k1.5?

Hy4 preview is developed by Tencent and Kimi-k1.5 is developed by Moonshot AI.

Related comparisons