DeepSeek launches V4-Pro with Agent upgrades and OpenAI Responses API support

DeepSeek announced the launch of DeepSeek-V4-Pro, citing major Agent upgrades and flexible reasoning effort settings of low, high, and max for V4-Pro and V4-Flash. The model supports the native OpenAI Responses API and is optimized for Codex with one-click setup. V4-Pro is available on the app and web through Expert Mode and via API, with model names unchanged.