Migrate to DeepSeek V4-Pro and V4-Flash Models Now
Update your API model parameters to v4-pro or v4-flash today.
Future-proof your applications by migrating your model parameters from the legacy `deepseek-chat` name to `deepseek-v4-pro` or `deepseek-v4-flash`.
The Scenario
You are managing an application that uses the DeepSeek API and want to ensure it is using the most modern version while avoiding future service deprecation.
Before & after
Developers would continue using the legacy 'deepseek-chat' name and face potential service disruption or missed efficiency gains once the old names are discontinued, a process that could take hours to fix later.
Use `deepseek-v4-pro` or `deepseek-v4-flash` to immediately benefit from the latest V4 architecture, taking only 10 minutes to update your API settings.
The Prompt
Review this API implementation and update the model names to deepseek-v4-pro or deepseek-v4-flash: [PASTE_CODE_SNIPPET]
The DeepSeek API is moving toward V4 models. 'deepseek-chat' and 'deepseek-reasoner' are now aliased to V4-Flash but will be discontinued on July 24, 2026. Switching now ensures long-term stability.
Source
Change Log | DeepSeek API Docs"model parameter should be set to `deepseek-v4-pro` or `deepseek-v4-flash`... legacy names will be discontinued in three months."