Future-Proof Your Apps by Migrating to DeepSeek-V4 Endpoints
Update your API parameters to the V4 version to avoid service disruption.
Transition your API calls from legacy model names to 'deepseek-v4-pro' or 'deepseek-v4-flash' before the July 2026 deadline.
The Scenario
You are maintaining a production application using the DeepSeek API and need to ensure it doesn't break when legacy models are retired.
Before & after
Developers frequently leave legacy model names in their production code, leading to unexpected outages or forced migrations that take hours to fix later.
Update your environment variables to 'deepseek-v4-pro' or 'deepseek-v4-flash' now. The update takes 2 minutes and prevents breaking changes in July.
The Prompt
Review my current API implementation for DeepSeek and help me update the model parameters to the new V4-Pro and V4-Flash standards: [PASTE_CODE_SNIPPET]
The legacy names 'deepseek-chat' and 'deepseek-reasoner' will be discontinued on 2026-07-24. Switcing now ensures you are using the latest V4 architecture.
Source
Change Log | DeepSeek API Docs"The two legacy API model names, deepseek-chat and deepseek-reasoner, will be discontinued in three months (2026-07-24)."