According to Sawyer Merritt on Twitter, Elon Musk revealed that Tesla's chip design team prefers using Grok, an AI model developed by xAI, over Opus from Anthropic, even after direct encouragement to try Opus (source: Sawyer Merritt, Twitter, Dec 10, 2025). This preference highlights Grok's effectiveness and suitability for highly technical AI-driven tasks in semiconductor design. The decision demonstrates Grok's competitive edge in enterprise AI tool adoption, suggesting significant business opportunities for xAI in the high-stakes chip design and hardware engineering sectors where workflow efficiency and AI integration are critical factors.