DeepSeek V4 Pro 0813 quietly released

DeepSeek has quietly released V4 Pro 0813, an update to its API that adds support for the Responses API format, enabling seamless integration with Codex. The new API supports streaming with server-sent events, function calling, and web search, while maintaining compatibility with existing OpenAI SDK clients. Notably, DeepSeek V4 Pro 0813 introduces a more efficient model, deepseek-v4-flash, and offers automatic context caching, making it a compelling option for developers seeking high-performance AI at scale.