Assistants Deep Dive - OpenAI API
You can attach a maximum of 20 files to code_interpreter and 10,000 files to file_search (using vector_store objects).
Each file can be at most 512 MB in size and have a maximum of 5,000,000 tokens. By default, the size of all the files uploaded in your project cannot exceed 100 GB, but you can reach out to our support team to increase this limit.