[Question] I want a good multi-LLM API-powered chatbot

Chatbots are pretty useful to me, but the pro plans are expensive. I don’t want to spend 20$/​month here and there. However, I couldn’t find a free chatbot app with at least OpenAI and Anthropic API support with a similar level of functionality as the online gpt or claude chatbots. In particular I want to attach images and pdfs.

The best thing I found so far is chatbox, but attaching documents is supported only with… a 20$/​plan, and it seems the docs are sent to their server.

Am I spoiled to expect a free open-source software for anything? Though that’s often the case for much more complicated applications I regularly use.

Does anyone know of something better?

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