Sonar
Sonar is Perplexity AI's in-house text generation model, built on Meta's Llama 3.3 70B and optimized for web-grounded question answering. Released in January 2025, it retrieves live internet data at query time rather than relying solely on static training knowledge, and every response includes inline source citations for transparency. It supports a 128,000-token context window and runs at approximately 121 tokens per second using Cerebras wafer-scale inference.