If it truly is GPT-4+ with a 128K context window it's still absolutely worth the high price. That is literally 300 pages. However if they are cheating like ever

If it truly is GPT-4+ with a 128K context window it's still absolutely worth the high price. That is literally 300 pages. However if they are cheating like everyone else who has promised gigantic context windows then we are better off with RAG and a vector database.