Sonar Reasoning is a Perplexity model based on DeepSeek R1, designed for long chain-of-thought reasoning with built-in web search. It is uncensored, hosted in US datacenters, and allows developers to leverage extended reasoning for complex queries, making it suitable for research and knowledge-intensive applications.
Retired on Feb 14, 2026: requests to this model ID now return an error. These models are live and work with the same API key.
Sonar Reasoning is a Perplexity model based on DeepSeek R1, designed for long chain-of-thought reasoning with built-in web search. It is uncensored, hosted in US datacenters, and allows developers to leverage extended reasoning for complex queries, making it suitable for research and knowledge-intensive applications.
No. Sonar Reasoning (Free) was retired on NagaAI on Feb 14, 2026, and requests to it now return an error. Live models you can use instead with the same API key: Sonar Reasoning Pro, Sonar Pro and LFM3-1.7B.
It takes text as input and returns text.
