xAI's Grok 4.5 is simultaneously one of the most capable coding AIs ever released and one of the least reliable models at telling the truth — and that combination is impossible to ignore. Grok 4.5 launched July 9th, took the top spot on the SWE Marathon benchmark for long-horizon software engineering, and landed fourth overall among frontier models. But independent researchers measured its hallucination rate at 54 percent, up from 25 percent in its predecessor — meaning it confidently gets things wrong more than half the time. Whether xAI can close that gap without sacrificing its agentic edge is the question that defines what Grok becomes next. Full breakdown of what the numbers actually mean and how to use Grok 4.5 without getting burned — in today's episode. New AI news every weekday — subscribe so you don't miss tomorrow's story.
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