Tencent: Hy4

Tencent: Hy4 is a paid model from Tencent that accepts text and image inputs and returns text. Its context window is 1,048,576 tokens, large enough to hold long documents, sizable codebases, or extended conversation histories in a single request, and it can generate up to 65,536 tokens per response. It supports tool calling and a reasoning mode, so it can fit agent-style workflows that call external functions. The listing does not specify structured output support or whether weights are openly available, so confirm both before building around them. At $0.417 per million input tokens and $1.2505 per million output tokens, Hy4 sits in a low-cost bracket, which makes it worth shortlisting for teams that need very long context, image input, and tool use on a tight budget. It has no independent benchmark coverage yet, so its quality is unproven. Run your own evaluations on representative tasks before relying on it in production.