Tencent Open-Sources Hunyuan HY3: 295B MoE with Switchable Reasoning
AdinaYakup · x · 2026-07-06
Tencent has released and open-sourced the Hunyuan HY3 model, featuring a 295B parameter / 21B activation Mixture-of-Experts (MoE) architecture. It supports a 256K ultra-long context, offers an FP8 quantized version, and is licensed under Apache 2.0.
The model supports switchable reasoning modes (no thinking / low intensity / high intensity), reduces hallucination rates by 50% compared to its predecessor, and demonstrates stable performance across mainstream agentic frameworks.
Targeting developer and enterprise deployment scenarios with a lenient open-source license, it serves as a major addition to the domestic open-source LLM landscape.
Related event: Tencent Open-Sources Hunyuan Hy3 for Agentic Workloads(26 posts)→
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