Perplexity API Overview Perplexity AI provides LLM inference augmented with real-time web search. Unlike standard LLMs limited to training data, Perplexity's online models fetch and synthesize current web information on every query. Responses include citations to source URLs. The API is fully OpenAI-compatible — use the SDK with a custom . Setup Available Models | Model | Type | Best For | |---|---|---| | | Online | Fast web-augmented answers | | | Online | Deep research, complex queries | | | Online | Step-by-step reasoning + search | | | Online | Advanced reasoning + deep search | | | Offli…