Elon Musk publicly criticized Microsoft’s recent rollout of OpenAI's GPT-5, branding it as “underwhelming” and asserting that his xAI's Grok 4 is the “most powerful AI” available. Meanwhile, Microsoft CEO Satya Nadella lauded GPT-5 as the "most capable model yet," emphasizing its advancements in coding and reasoning. Musk noted that Grok 5 is already under development, featuring innovative tools like the "Imagine" function for generating images and videos, intensifying competition in the AI landscape.