Sonar Deep Research

Sonar Deep Research is a reasoning-focused model within Perplexity's Sonar family, designed to conduct exhaustive searches across hundreds of sources and assemble them into detailed, expert-level reports rather than single answers. Perplexity positions it for situations where the reader needs a structured view of many documents, their disagreements, dates, and underlying claims, making it well suited to work that depends on breadth of evidence and explicit citation of where each finding originated.

In practical use, Sonar Deep Research fits multi-source investigative tasks such as market and competitor mapping, academic and literature reviews, due-diligence and vendor evaluation, and tracking regulation or emerging trends where separating enacted rules from proposals and commentary matters. Pricing on the official Perplexity documentation reflects its research workflow, with separate rates for input, output, citation, search-query, and reasoning tokens, while the Sonar line is being phased toward Perplexity's Agent API, with support scheduled through late September 2026.