Hy3 is Tencent's open-weight text model with an unusually large context window of 262,144 tokens — one of the more generous context sizes available in openly licensed models. It handles text-in, text-out tasks and ships in the safetensors format under Apache 2.0, making it straightforward to deploy and modify. Detailed capability benchmarks are limited, so its practical strengths are best assessed through direct experimentation.