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Musk jabs at OpenAI, says Grok 4 Heavy 'smarter 2 weeks ago' than newly launched GPT-5

Summary by Fox Business
Elon Musk took to X Thursday to claim xAI's Grok 4 Heavy AI model was smarter than OpenAI's newly released GPT-5 two weeks before its launch.

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Fox Business broke the news in United States on Thursday, August 7, 2025.
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