In those cases, OpenRouter just chooses providers that agree not to train / offer ZDR. Which sometimes means you start off without access to the model until some other providers start offering it.

In a sense, it's working as intended. If you set zdr to true, you currently can't use DeepSeek v4. However, once other providers offer it (it is an open model, after all), some may allow zdr.

Yeah, OR gives a bunch of providers, including Deepseek, which does train.

I set ZDR to true, and it only calls from the third party ZDR Deepseek APIs. Bit more expensive, but my client wants it.