Migrate Your DeepSeek API Integration to V4 Model Names Immediately
Update your API model parameters to avoid service disruption by July 2026.
Switch your API model parameters from 'deepseek-chat' or 'deepseek-reasoner' to the new 'deepseek-v4-pro' or 'deepseek-v4-flash' names.
The Scenario
You are a developer or power user with a custom AI integration or automation script that relies on the DeepSeek API. You need to ensure your tools don't break when legacy model names are retired.
Before & after
Developers manually check logs and maintain legacy model names like `deepseek-chat` for months until they break. This oversight typically leads to 30-60 minutes of emergency debugging when the model is finally discontinued.
Update your configuration to use `deepseek-v4-pro` or `deepseek-v4-flash` to ensure uninterrupted service. This migration takes less than 2 minutes of configuration time.
The Prompt
I am using your API. Please review my current model configuration: [INSERT_CONFIG_OR_CODE]. Help me update my integration to use the new `deepseek-v4-pro` or `deepseek-v4-flash` endpoints as per the latest documentation to avoid the July 2026 deprecation.
The legacy names deepseek-chat and deepseek-reasoner will be discontinued on 2026-07-24. Mapping your applications to the specific V4-Pro or V4-Flash models now ensures stability and better performance matching.
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)."