The product is built with some open source and some retrained models, it analyses input links or linked images with tesseract/unified IO / OFA / beautiful soup so it can answer questions about images/receipts etc.
The site itself is on app engine standard python with stripe/firebase UI for auth, which is running very cost effectively.
In future in planning to layer on more content understanding eg audio with whisper etc, then milvus/haystack for lookup phases for more factual question answering, then some work on automated retraining and regeneration etc for hard cases, then searching other systems/internal code and logic execution etc, eventually with a few more steps I'm hoping it will feel like I made AGI in a rack in my house lol...