Practical guides · Models & Agents

Guide: distinguish DeepSeek V4 Pro continuation from Flash alias routing

DeepSeek's current docs say V4 Pro service will continue after September 14 with unchanged billing. Older Flash aliases route to V4.1 Flash. Documentation-based; not hands-on tested.

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The guidance

Check the model name in your integration against the live table. DeepSeek lists deepseek-v4-pro as V4-Pro-0813 and says service will continue after September 14 with unchanged billing, subject to further notice. The continuation statement has no separate amendment date; this guide checks current documentation rather than dating that decision. [D1][D2]

For Flash, the docs recommend deepseek-flash. The accepted legacy names deepseek-v4-flash and deepseek-v4-flash-vision-exp temporarily serve V4.1 Flash at Flash prices. The table marks vision support for Flash, but not Pro. These distinctions are worth checking before changing a production configuration. Documentation-based; not hands-on tested. [D1][D2]

Source notes

Primary documents, company announcements and research are identified below. A company claim is not an independent test.

  1. [D1] Change Log — September 10 entry, current text
    DeepSeek · 10 September 2026 · official-documentation
  2. [D2] Models & Pricing
    DeepSeek · Publication date not stated · official-documentation

Publication & updates

First published in the 14 September 2026 edition. This guide keeps the same URL when its content is revised.

Edition version 1 · Edition last updated 14 September 2026. Edition updates may concern other articles and do not establish when this guide was last checked.

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