I use opencode or pi harness with the deepseek api for all my at home coding usages.

Deepseek is at least on par with Sonnet (ghcopilot at work)- I don’t use opus, too spendy and I don’t need that level of ability.

The cost is for me was $5/6 months of use. Not a big user I guess! It’s good though, fast enough and incredibly inexpensive.

Been testing Qwen 3.6 28B on a 5090, and it’s also quite good for “free”.

I mostly do small self serving embedded projects based on esp32, so not very complex.