When did you start paying for AI apps, and what made you upgrade?

Do you actually switch between different models (GPT4/Claude/DeepSeek), or mostly stick to one?

For people using many AI tools: Is it worth paying for all of them? I'm curious to know not only about the general apps like ChatGPT, but maybe some fun apps for photo editing, video creation, etc.

Personally, we are paying for ChatGPT and Claude, and they're both worth the cost.