Affected users told TechCrunch say they were using Grok Lite, and noticed the issues as early as Wednesday morning.
xAI's Grok model generated gibberish for Grok Lite users; refreshing sessions resolved most cases. The glitch coincides with 50+ researcher departures in recent months, raising concerns about production stability and engineering depth for their Opus-class model.
Image Credits:Andrey Rudakov/Bloomberg / Getty Images
10:32 AM PDT · August 20, 2026
An unusual glitch has resulted in the xAI’s Grok chatbot speaking gibberish to many users.
After asking the model to generate a PDF, one user received the response: “match it without and your they and two for planets can practical and often cheese…” with similar nonsense continuing for several paragraphs.
Checking source links, another user found a string of links to reinforcement learning research sites.
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