Developer Prompts ChatGPT, Claude, Perplexity, and Gemini Then Watches Nginx Logs — AI Traffic Analysis

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A developer's experiment prompting four major AI assistants and monitoring Nginx access logs to see which ones actually fetch referenced URLs generated 130 points and 22 comments on HN. The analysis reveals how each model handles URL verification differently — some perform real-time fetches while others appear to fabricate web access. For builders running websites that increasingly serve AI agent traffic (Cloudflare reported agentic traffic is now 10% of all requests), this is actionable intelligence about what AI-generated traffic actually looks like in server logs and how to distinguish real from hallucinated web access.