20$ chatgpt plus.
5/10$ opencode go.
Planner GPT 5.5
Research deepseek v4 flash
Coder deepseek v4 flash
Reviewing GPT 5.5
System prompts for each matter. I tried a few versions and now I'm doing progress in a day that I was doing in a month.
I don't know about UI but when it comes to building any logical software, it can literally do anything.
Also it's obvious but GitHub is your best friend. For anything you're building always look for anyone that built something that can help you.
The open source market is thriving. AI is thriving. It's time to make money before it's over.