# Pandaily — Tencent Hunyuan Releases Hy4 Preview, Ranking Among the Top Tier of Open-Source Models

- Company: Pandaily (pandaily.com)
- Announced: 2026-08-28T08:07:01+00:00
- Category: new-model
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://pandaily.com/tencent-hunyuan-hy4-preview-open-source-aug2026
- Record: https://forck.live/items/7075-tencent-hunyuan-releases-hy4-preview-ranking-among-the-top-tier-of-open-source
- Subject: Reporting
- Open weights: yes
- Models affected: Hy4 preview, GLM 5.3, Kimi K3
- License: open source
- Context window: exceeding 1 million tokens
- Pricing: $0.834 per million input tokens, $2.501 per million output tokens, and $0.042 per million tokens for cache hits

Tencent Hunyuan released Hy4 preview, an open-source model with 770 billion total parameters and 49 billion activated parameters, ranking among top-tier open-source models. The model outperformed GLM 5.3 and Kimi K3 in an internal blind evaluation and is integrated into Tencent products such as WorkBuddy and CodeBuddy. Hy4 preview is available via API through Tencent Cloud TokenHub and OpenRouter at stated prices.

## Evidence

Verbatim from https://pandaily.com/tencent-hunyuan-hy4-preview-open-source-aug2026:

> Tencent Hunyuan’s Hy4 preview marks the company’s third major model release in six months, reflecting its rapid development cadence and growing strength in foundation models. With 770 billion total parameters, 49 billion activated parameters, and a context window exceeding 1 million tokens, Hy4 preview ranks among the top tier of open-source models and performs strongly across coding, office productivity, and scientific research.

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Record: https://forck.live/items/7075-tencent-hunyuan-releases-hy4-preview-ranking-among-the-top-tier-of-open-source
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