Perplexity Sonar Deep Research runs a multi-step research workflow: planning, iterative searching, cross-referencing, and synthesis. Produces long-form reports with many citations. Best for analyst-grade investigations; takes longer and costs more than single-shot Perplexity calls. Maximum context window (input and output combined): about 128,000 tokens. Maximum output per reply: about 8,000 tokens (model reasoning, if any, counts toward this limit). Maximum total upload size per request: 256MB (all files and message content combined). Accepted document formats: pdf, docx, xlsx, pptx, txt, csv (file content is provided to the model as extracted text). Accepted image formats: gif, jpeg, jpg, png, webp. Maximum size per image: 50MB. Image dimensions: at least 200 pixels per side. Maximum image resolution: 36,000,000 pixels in total. Output content formats: Text This module supports continuous conversations. AI can make mistakes. Please verify important information.