July 5, 2026 – When SpaceX agreed to acquire the AI coding startup Cursor for a staggering $60 billion last month, industry watchers hailed it as a strategic win for both sides. Cursor gains access to SpaceX's massive computing infrastructure, while Elon Musk secures one of the most popular developer tools on the market. But beneath the fanfare, a critical question is now rattling the AI sector: Will Cursor remain an open platform for rival models, or will Musk's ownership sever ties with OpenAI and Anthropic?
Cursor's entire business model has long relied on its role as a neutral marketplace for AI models. Unlike competitors that lock users into proprietary systems, Cursor lets developers pick from a menu of offerings—including OpenAI's GPT-4 and Anthropic's Claude—to power its coding assistant. This "best tool for the job" approach has made Cursor a darling among developers and a top customer for both AI labs. Yet the SpaceX acquisition, expected to close later this year, threatens to upend that delicate ecosystem.
According to sources close to Cursor, the startup intends to keep offering third-party models even after the deal is finalized. But skepticism is running high. Musk, who co-founded OpenAI before leaving and launching his own xAI venture, has a history of fractious relations with the labs. OpenAI and Anthropic now compete directly with Cursor through their own coding tools—Codex and Claude Code, respectively—making the partnership a "frenemy" dynamic that the acquisition could shatter.
Eno Reyes, CTO of the competing AI coding startup Factory, says the outcome is far from certain. "I don't know if the decision is as black and white," Reyes told us. "It's actually super unclear to us." Industry experts note that cutting off Cursor would be a painful financial blow for both OpenAI and Anthropic, which count the startup among their largest revenue sources. Conversely, allowing Musk's company to distribute their models could hand a strategic advantage to a rival.
Cursor, OpenAI, Anthropic, and SpaceX all declined to comment for this story. As regulators scrutinize the deal, the AI industry is watching closely. If Cursor loses access to competing models, it could fracture the open-platform model that has driven developer innovation. If it retains them, it may set a precedent for how tech giants handle competing AI in an increasingly fragmented landscape. Either way, the answer will shape the next era of AI development.