Tencent · 2026-11-04 · major
Hunyuan Hy4 — Tencent's full release adds vision and computer use
Hunyuan Hy4 is the full release of Tencent's flagship model after the August preview. It adds image input and computer use, keeps a 1M-token context, and is live on Tencent Cloud and OpenRouter. Open weights come later.
Tencent's Hy4 leaves preview with image understanding and the ability to operate apps, on a 1M-token context.
Key specs
| Context window | 1,048,576 tokens |
|---|---|
| Max output | 65,536 tokens |
Quick facts
| Maker | Tencent Hy Team |
|---|---|
| Input / output | Text and images in, text out |
| Availability | Tencent Cloud, OpenRouter (tencent/hy4), CodeBuddy, WorkBuddy, Yuanbao, ima |
| List price | $0.834 in / $2.501 out per 1M tokens |
| Open weights | Planned, with a system card; not yet published |
| Next | Hy4 Flash, a faster and cheaper variant |
What is it?
Hunyuan Hy4 adds vision and computer use to Tencent's flagship model, which shipped as an open-weight preview in August. Tencent says it can read fine image detail and complex charts and work across both command-line and graphical interfaces. The final model is hosted now; Tencent plans to publish the weights and a full system card later.
How does it work?
Tencent scaled up both pre-training and post-training over the preview. Targeted training covered Blender, CAD and long workflows that span several applications, plus front-end work and game development in Unreal Engine, Unity and Godot, where Tencent reports gains of 19.1% on GameDev and 9.8% on GameLogic over the preview. During training Tencent kept only defensive cybersecurity data and filtered out exploit development and penetration-testing material.
Why does it matter?
The hosted API takes images as well as text, so developers get vision and agent use on a 1M-token context at a low price: OpenRouter currently lists $0.417 input and $1.251 output per million tokens. In a company-run test with 213 finance professionals across 579 tasks, Tencent says Hy4 scored 3.04, ahead of DeepSeek V4.1 Flash 1017 (2.97) and Kimi K3.1 Pro and GLM-5.3 (2.68 each). Tencent also admits a gap to top closed models on research math and long-horizon coding.
Who is it for?
developers building agents on low-cost long-context models
Frequently asked questions
- Is Tencent Hy4 open source?
- Not yet. The full Hy4 release is hosted only, through Tencent Cloud, OpenRouter and Tencent apps. Tencent says the weights will follow later with a comprehensive system card and vLLM and SGLang support. The earlier Hy4 preview from August 2026 is already open-weight on Hugging Face under Apache 2.0.
- How much does the Tencent Hy4 API cost?
- Tencent's listed Hy4 API price is unchanged from the preview: $0.834 per million input tokens, $2.501 per million output tokens and $0.042 per million cached input tokens. OpenRouter's live listing for tencent/hy4, served by Tencent Cloud, currently shows $0.417 per million input tokens and $1.251 per million output tokens.
- How does Hy4 differ from Hy4 preview?
- The full Hunyuan Hy4 accepts images as well as text, where the preview was text-only, and adds computer use across command-line and graphical apps. Tencent reports less hallucination in internal search tests, from 15.76% to 5.45%, and fewer speculative errors, from 23.1% to 5.6%. Unlike the preview, the full model's weights are not published yet.
- What is Hy4 Flash?
- Hy4 Flash is a separate model Tencent plans to release in the near future. Tencent describes it as a variant of Hy4 with much better cost efficiency and faster inference. Tencent has not given a release date, size or price for Hy4 Flash.
Try it
Model id tencent/hy4 on OpenRouter