
Truly open breakthrough AI.

Real-time, web-grounded AI models and API for generative search.
Ai2: Truly open breakthrough AI.. Sonar by Perplexity: Real-time, web-grounded AI models and API for generative search.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. Ai2 is free and Sonar by Perplexity is freemium.
The best choice between Ai2 and Sonar by Perplexity depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Ai2 is primarily designed for individuals, while Sonar by Perplexity is built for individuals.
Ai2 offers: Open language models (OLMo), Multimodal AI models, AI for science applications (Asta), Semantic scientific search (Semantic Scholar). Sonar by Perplexity offers: Real-Time Web Search with Verified Citations, Chain-of-Thought Reasoning (Sonar Reasoning Pro), OpenAI Client Compatible API, Flexible Sonar Models (Sonar, Sonar Pro, Sonar Deep Research).
Based on our data, Ai2 currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.