I'd suggest using OpenCode (via Go sub or just API credits). It will give you access to more than just one companies models and you can experiment and find one that works best for you.
I really like GLM and ended up subbing to both OpenCode Go & z.ai. Mistral, Kimi and Mimi are all also options as well. I have been eyeballing the Kimi Pro sub for a while now and contemplating cancelling my ChatGPT sub for it.
I ended up using DeepSeek V4 Flash as main workload model, while keeping DeepSeek V4 Pro and Qwen 3.7 Plus as advisors on system architecture and other advanced matters to guide DS Flash.
I really like GLM and ended up subbing to both OpenCode Go & z.ai. Mistral, Kimi and Mimi are all also options as well. I have been eyeballing the Kimi Pro sub for a while now and contemplating cancelling my ChatGPT sub for it.