For Deepseek Harness: Deepseek API or Opencode Go?

I have been using the Deepseek harness(V4.1-Flash Max) with the Deepseek API and its been great. I keep reading that Opencode Go plans provide you with even more usage, however is it really the same version(V4.1-Flash Max)? Again I only want to use Deepseek Harness. Edit: I also use the model with 1M context window Edit 2: The reason why I am asking is because I saw posts on X about how it seems like Opencode might be lying about the model or how its getting served?