Though with open models you have a lot of choice where to get it from. I see like ~15 providers here with various logging/ZDR policies, so pick whatever mix of price to features you want:
I don't believe a single word from AI companies, no matter where they are from. Sourcing their training data is run like genuine criminal enterprises - last year Anthropic settled for 1.5 billion, and and if they settled so quickly it might mean what we would see in court is even worse.
When I use their API I use it knowing that they probably train on the data, and knowing that it's probably used to improve future iterations of their models.
But I use their API extremely rarely lately, because local Flash is good enough for me the vast majority of the time
If you self host then you can audit the open-source llama.cpp or whichever other program you are using for inference, to see exactly what it does, and also whichever open-source harness you use for implementing a coding assistant or other agentic workflow.
The model consists of a bunch of data files, it does absolutely nothing by itself.
If you run inference on your own hardware, you have absolute control on how the LLM is used, not like when you use an external service provider.
https://openrouter.ai/deepseek/deepseek-v4-flash