Explicit sharing of PDF content (inputs and outputs) with Anthropic and OpenAI with no training prohibition stated; targeted advertising data collection and use (personalized ads, remarketing); browser extension, Zotero plugin, and ChatGPT plugin create agentic access to document libraries; no security certifications; unclear retention for PDF vector/text data.
Do not upload confidential or pre-publication research papers. Use only for publicly available papers. Disable personalized advertising in account settings if available. EU/UK users can exercise GDPR access and deletion rights. For institutional use, request enterprise agreement with explicit no-training and no-advertising-use provisions.