Sonar Reasoning Pro

Sonar Reasoning Pro belongs to Perplexity AI's Sonar family of proprietary search-oriented language models, offered to paid subscribers of perplexity.ai and accessible through the Sonar API. It sits alongside the base Sonar tier and the higher-end Sonar Pro variant, forming a tiered lineup where users can choose the depth of search and reasoning that fits their use case. Within this lineup, Sonar Reasoning Pro is positioned as the advanced reasoning option, while Sonar Pro focuses on advanced query processing more broadly.

A defining feature of the Sonar lineup is the tiered search-modes system introduced for Sonar, Sonar Pro, and Sonar Reasoning Pro, which lets callers balance performance and cost through High, Medium, and Low settings. High delivers maximum depth and context for complex queries, Medium offers a balanced approach for moderately complex questions, and Low optimizes cost efficiency for straightforward queries while preserving accuracy. Sonar Reasoning Pro also benefits from citation pricing relief: alongside Sonar Pro, it is exempt from citation-token charges in the new modes, simplifying billing and making deep search-and-reasoning workflows more economical for API consumers.