Future-Proof Your API Integrations by Switching to DeepSeek-V4 Models Early
Update your API model parameters to v4-pro or v4-flash today.
Switch your API model identifiers to the DeepSeek-V4 series to prevent service interruptions when legacy model names are discontinued in July 2026.
The Scenario
You are an engineer maintaining an application that relies on the DeepSeek API and you need to ensure service continuity before the legacy models are retired.
Before & after
Developers would manually monitor deprecation dates and update API calls one by one across various apps. This process typically takes 30-60 minutes depending on the codebase size.
Update your code to use the `deepseek-v4-pro` model name and maintain your existing base URL. This migration takes roughly 5 minutes.
The Prompt
I am currently calling [OLD_MODEL_NAME_E.G._DEEPSEEK-CHAT]. Rewrite my API integration code to use the new 'deepseek-v4-pro' model in the OpenAI-compatible interface. My current base URL is https://api.deepseek.com.
The legacy 'deepseek-chat' and 'deepseek-reasoner' names will expire on 2026-07-24. Switching to the V4 series now ensures access to the latest Flash and Pro features while avoiding future breakage.
Source
Change Log | DeepSeek API Docs"The two legacy API model names... will be discontinued in three months... the model parameter should be set to `deepseek-v4-pro`."