Elon Musk announced a delay in the training of Grok 4.20, xAI’s next major AI model update. Responding to a post about Grok 5 training on the massive Colossus 2 supercluster, Musk explained that extreme cold weather, combined with construction equipment damaging power lines, caused uptime issues at the facility. As a result, Grok 4.20’s training timeline has shifted by a few weeks and is now targeting completion in mid-February rather than earlier plans. The setback highlights the infrastructure challenges involved in scaling AI compute under harsh conditions. Community reactions ranged from supportive patience to light-hearted memes. Elon Musk Claims xAI’s Grok Imagine 1.0 Generates More Images and Videos Than All Competitors Combined; Says Rapid Improvements Coming Every Week.

Elon Musk Says Grok 4.20 Training Delayed Amid Cold Weather

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