SpaceX filed for an IPO a week ago, and Elon Musk is already creating confusion. Days before the reusable rocket maker is slated to start pitching its story to investors, Musk took to social network X (which is owned by SpaceX) late Wednesday to explain details of the company's recent partnership with competing AI startup Anthropic. His comment included a potentially material aspect about their deal that wasn't included in SpaceX's 300-plus page IPO filing . Earlier this month, SpaceX said it