Sonar by Perplexity

Sonar by Perplexity is an advanced AI-powered search engine that redefines how users interact with information online. Its core value proposition lies in offering a customizable and transparent research experience, where users are not limited to a single AI model but can select from a curated list of state-of-the-art large language models to generate answers. This approach combines the power of real-time web search with the reasoning capabilities of different LLMs, delivering concise, well-structured summaries that are directly cited to their original sources, thereby enhancing trust and verifiability.

Key features: The platform allows users to manually select an LLM, such as GPT-4o, Claude 3.5 Sonnet, or Perplexity's own experimental models, to process their query. It performs a live web search, synthesizes the findings, and presents a coherent answer with inline citations that link directly to the source webpages. Users can ask follow-up questions in a conversational thread, and the tool offers related suggested questions to dive deeper into a topic. It also provides the option to view the raw search results in a traditional list format alongside the AI-generated summary.

What sets Sonar apart is its model-agnostic, user-choice-centric design. Unlike standard AI search tools that operate as a black box with a fixed backend model, Sonar puts the decision in the user's hands, acknowledging that different models have different strengths in coding, creative writing, or logical reasoning. Technically, it acts as a sophisticated orchestrator, routing the user's query through the selected model's API while managing the web search, synthesis, and citation pipeline in a seamless interface. This creates a unique hybrid between a traditional search engine and an interactive AI research assistant.

Ideal for researchers, students, journalists, and professionals who need to quickly gather and synthesize information from the web with a high degree of accuracy and source transparency. Specific use cases include academic literature reviews, competitive market analysis, fact-checking for content creation, and technical troubleshooting where understanding the provenance of information is critical. It is particularly valuable in industries like media, consulting, and education where evidence-based answers are paramount.

As a freemium product, Sonar offers robust functionality in its free tier, which includes a generous number of queries with access to powerful models. For heavy users requiring higher usage limits and priority access to the latest models, Perplexity offers a professional subscription plan.