Dax has said time and again they don't quantize the models they offer. Assuming they trust their upstream providers (I don't think believe they run their own inference) and we trust them, what you get with OpenCode Go is exactly what you'd get from the DeepSeek API.
I am personally a very happy OpenCode Go user. $10 month has never felt more useful.
Eh there's a lot of ways to 降智, quants are just the most visible. I noticed a fair bit of variance with opencode go and went back to deepseek direct.