# Tencent — Hy3 preview: The First Step in Rebuilding the Hy model

- Company: Tencent (tencent.com)
- Announced: 2026-04-22T16:00:00+00:00
- Category: open-weight-release
- Subject: Hunyuan
- Open weights: yes
- Models affected: Hy3 preview
- Context window: 256K context window
- Pricing: personal tiers starting at 28 CNY/month
- Source: https://hunyuan.tencent.com/research/hy3-preview
- Record: https://forck.live/items/4580-hy3-preview-the-first-step-in-rebuilding-the-hy-model

Tencent releases and open-sources Hy3 preview, a 295B-parameter MoE model with 21B active parameters, supporting three reasoning modes and a 256K context window. The model is the first trained on rebuilt infrastructure and shows improvements in reasoning, instruction following, coding, and agent tasks. It is available on GitHub, HuggingFace, ModelScope, and GitCode, and supports vLLM and SGLang. API pricing is competitive, and Token Plans start at 28 CNY/month.

## Evidence

Verbatim from https://hunyuan.tencent.com/research/hy3-preview:

> Today, we are releasing and open-sourcing Hy3 preview. It is a 295B-parameter Mixture-of-Experts (MoE) model, with 21B active parameters, supporting three reasoning modes for latency/depth tradeoffs, and a 256K context window.

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Record: https://forck.live/items/4580-hy3-preview-the-first-step-in-rebuilding-the-hy-model
Catalogue: https://forck.live/llms.txt
Feed: https://forck.live/feed.md