Grok 4.5 Beta: SpaceX & Tesla Test New AI Model

Grok 4.5 has entered private beta at SpaceX and Tesla. This AI model uses a 1.5 trillion-parameter V9 foundation. It was trained with data from Cursor, an AI-powered code editor. Internal evaluations suggest Grok 4.5 performs close to or even exceeds Opus, which is Anthropic's most capable model. This would be a significant achievement for xAI, Elon Musk's AI company. What's interesting is the use of Cursor data. This platform captures programming patterns and coding contexts that many AI models don't typically see. This approach could give Grok 4.5 stronger programming capabilities. This private beta at SpaceX and Tesla allows for real-world testing. Both companies use AI extensively, from software and operations at SpaceX to vehicle systems at Tesla. The bottom line is that this move signals xAI is transitioning from hype to demonstrating actual capability.