DeepSeek Chat sits inside DeepSeek's evolving lineup of conversational models, an open-weights text-to-text system that developers can route through third-party providers like the Kilo Gateway. The model key deepseek/deepseek-chat is a legacy alias within the DeepSeek family, designed to offer a general-purpose chat experience for everyday reasoning, drafting, and code-adjacent tasks. Its open-weight heritage makes it attractive for teams that want to inspect or self-host the underlying weights while still benefiting from a managed inference path.

According to DeepSeek's official API changelog, the deepseek-chat alias is being retired and traffic now resolves to the V4 generation, with DeepSeek-V4-Pro reaching general availability on 2026-08-13 across the APP, Web, and API under the name deepseek-v4-pro, accompanied by significantly enhanced agent capabilities. The changelog directs developers to migrate to deepseek-v4-pro or deepseek-v4-flash and to adopt the new Responses API integration along with thinking-effort parameters. For Kilo Gateway users, this points to a forward path toward stronger agent-style behavior and a redesigned request surface, even as the practical choice between chat-style convenience and the newer agent-tuned endpoints becomes the central fit question.