Grok 4.5: Internal Testing at SpaceX & Tesla; Beats Claude Opus

Elon Musk announced that xAI's Grok 4.5 is undergoing internal testing at SpaceX and Tesla. Musk also stated that xAI plans to release a new foundation model, trained from scratch, every month through the end of the year. Internal evaluations suggest Grok 4.5's performance may exceed Claude Opus. This aggressive development pace aims to accelerate commercialization and address significant operating losses, which reached $2.47 billion in the first quarter of 2026. The company is leveraging SpaceX's computing resources. This strategy requires high capital expenditure and puts pressure on xAI to demonstrate commercial value amidst rising competition. This rapid development cycle could significantly impact the AI landscape.