Full disclosure up front: I run ai-info.fastget.link , where I track AI API pricing and publish the DeepSeek V4 cost calculator this post is based on. All rates below were checked against official pricing pages and live dashboards on 2 Sep 2026 — if you're reading this later, treat them as a snapshot, not gospel. No affiliate links anywhere. The pricing page is lying to you (sort of) DeepSeek doesn't have one price for V4. It has four, and which one you pay depends on deci...