DeepSeek V4-Pro Lands With Native OpenAI Responses API Support and Tunable Reasoning Effort

DeepSeek shipped V4-Pro with major agent upgrades, flexible reasoning effort, and — notably — native support for OpenAI's Responses API, a move that lets developers swap it into existing stacks with minimal friction.

DeepSeek launched V4-Pro on Thursday to the kind of numbers that make frontier labs uncomfortable — over 12,000 likes and more than a million views on the announcement from @deepseek_ai. The release headlined major agent upgrades and flexible reasoning effort, but the detail that matters most to builders is buried in the feature list: native support for OpenAI's Responses API.

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