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Perplexity Sonar Deep Research
What ChatGPT, Claude, Gemini & Grok actually say · July 2026
The verdict
Perplexity Sonar Deep Research appears in 1 AI-ranked category — best position #2 for deep research api for agents.
Claude #2
Built on Perplexity's own live search index, so it delivers fast, well-cited, current-events-aware research at a much lower price point than OpenAI, with simple chat-completions-style integration
Where Perplexity Sonar Deep Research falls short, per the models
- Claude Deepen the reasoning layer — reports are broad and current but shallower on multi-hop analytical synthesis than OpenAI's, and tool/MCP extensibility is limited
Top alternatives per the models: OpenAI Deep Research · Gemini Deep Research · Exa Research · Parallel
Rankings are computed from what the models answer, re-polled continuously · raw reasoning shown verbatim · methodology