AI Assistants Do Not Always Render JavaScript: The SEO Test
Duration: 3:44 ·
TL;DR: On June 16, 2026, Andre Alpar published a server-log test of 12 AI assistants. Six major US assistants (ChatGPT, Claude, Gemini, Perplexity, Meta AI, Microsoft Copilot) answered grounding prompts from the raw HTML decoy and never used the JavaScript-rendered value.
Video summary
- Test a raw HTML decoy against a value delivered by an external JavaScript request.
- Use server logs to check which resources each assistant actually requested.
- Keep important answers available in raw HTML instead of relying only on Google rendering.