I just use a mix of Cerebras Code for lots of fast/simpler edits and refactoring and Codex or Claude Code for more complex debugging or planning and implementing new features, works pretty well. Then again, I move around so many tokens that doing everything with just one provider would need either their top of the line subscriptions or paying a lot per-token some months. And then there's the thing that a single model (even SOTA) can never solve all problems, sometimes I also need to pull out Gemini (3 is especially good) or others.
I think the bar for when coding models are "good enough" will be a tradeoff between performance and price. I could be using Cerebras Code and saving $50 a month, but Opus 4.5 is fast enough and I value the piece-of-mind I have knowing it's quality is higher than Cerebras' open source models to spend the extra money. It might take a while for this gap to close, and what is considered "good enough" will be different for every developer, but certainly this gap cannot exist forever.