Migrate Legacy API Model Names to DeepSeek-V4 Endpoints
Future-proof your tools by switching to V4-Pro or V4-Flash.
Migrate your API integrations from legacy names to the 'deepseek-v4-pro' or 'deepseek-v4-flash' identifiers before the July 2026 deadline.
The Scenario
You are maintaining an AI-powered application and need to ensure your API calls remain functional past the July 2026 deprecation deadline.
Before & after
Ignoring model deprecations leads to broken applications and emergency fixes when old endpoints are finally shut down, often costing hours of downtime.
Update your API endpoint once to 'deepseek-v4-pro' or 'deepseek-v4-flash' in 5 minutes to maintain service and access the superior V4 capabilities.
The Prompt
Review my current API implementation for any deprecated DeepSeek model names and suggest the update to 'deepseek-v4-pro'. Current Code Snippet: [PASTE_API_CODE_HERE]
The legacy model names 'deepseek-chat' and 'deepseek-reasoner' will be discontinued on 2026-07-24. Developers should migrate to version-specific names like V4-Pro or V4-Flash.
Source
Change Log | DeepSeek API Docs"The two legacy API model names... will be discontinued in three months (2026-07-24)."