Correct. According to https://minimaxir.com/2026/05/openrouter-hy3/#llm-economics-... [0] when served by DeepSeek, Cache Read Costs/Input Costs are a very low percentage:

  DeepSeek V4 Pro    0.83%
  DeepSeek V4 Flash  2%

Notice that OpenRouter response caching is not available when account-level ZDR is enforced [1]

[0] https://news.ycombinator.com/item?id=48317294#48317823 [1] https://openrouter.ai/docs/guides/features/response-caching#...