{"type": "article", "title": "I Tested ChatGPT, Gemini, Perplexity, and Grok on Deep Research. One Clear Winner Emerged", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/i-tested-chatgpt-gemini-perplexity-and-grok-on-deep-research-one-clear-winner", "original_source": "https://uk.pcmag.com/ai/158886/chatgpt-gemini-perplexity-grok-deep-research-ai-chatbot-test", "published": "2026-08-17T15:36:06+00:00", "accessed": "2026-08-17", "id": "i-tested-chatgpt-gemini-perplexity-and-grok-on-deep-research-one-clear-winner"}