SpaceX gives Cursor $60B offer and $10B Upfront

On April 21, 2026, SpaceX revealed that it had formed a partnership with Cursor – the AI-powered code writer developed by San Francisco-based Anysphere and obtained an option to acquire the entire company for $60 billion before the close of this year. If Elon Musk’s rocket company doesn’t buy the company, it will still have to pay Cursor $10 billion for the partnership. That’s not a typo. A $10 billion breakup fee, one of the largest ever to be paid on a termination.

The cursor has been hitting a wall. Its Composer model, an agentic AI code writer that can write and manage code, has improved dramatically with each iteration. Composer 1.5 scaled reinforcement learning more than 20x. Composer 2 added continued pretraining and reportedly outperformed Claude Opus 4.6 on TerminalBench at 10% of the cost (Cursor.com). But to make bigger advances, you need bigger hardware, and Cursor didn’t have it. SpaceX does. It’s Colossus supercomputer, located in Memphis, Tennessee, and run by its xAI subsidiary, packs the compute power of a million Nvidia H100 chips, one of the world’s largest clusters of GPUs (Graphic Processing Units).

“The collaboration between Cursor’s best-in-class product and access to expert software engineers through the distribution network and SpaceX’s Colossus training supercomputer (equivalent to a million H100’s) will enable us to create the most useful models.”

SpaceX, via post on X, April 21, 2026

The timing was deliberately engineered. Just hours before the reveal, Cursor was reportedly close to penning a $2 billion private funding round at a $50 billion valuation, with Andreessen Horowitz, Nvidia, and Thrive Capital participating. SpaceX made an offer $10 billion richer than the VC’s were set to pay. Microsoft had reportedly considered buying the company. Cursor’s rapid growth justifies the price. It released its first product in early 2023. It hit $100 million in annualized revenue (ARR) in January 2025, a mark reached by Slack after two and a half years, and Dropbox after four years.

In February 2026, it was $2 billion ARR. Now 67% of the Fortune 500 use Cursor, including Salesforce, Samsung, and Budweiser. The 25-year-old CEO of the tool, MIT dropout Michael Truell, is now listed as a billionaire by Forbes (Fortune.com).

Musk is on a mission to acquire AI, not a business deal. OpenAI, which attempted to buy Cursor in early 2025, has Codex, which surpassed four million monthly active users on the day the announcement was made. Anthropic has Claude Code, which drove the company’s annualized revenue to surpass $30 billion as of April 2026. Cursor has been relying on Claude and GPT models, which is a complicated position as its competitors have become its model partners. The SpaceX deal is Cursor’s way out of that situation.

There is one detail to keep an eye on. Last month, it was reported that Composer 2’s foundation was based on an open-source model from Moonshot AI, a Chinese company. For a company that might become a part of SpaceX’s defense-related aerospace business, that’s a detail that is unlikely to “pass muster” with national security officials.

On April 1, 2026, SpaceX lodged its confidential IPO filing with the SEC, aiming to list in June with a $1.75 trillion valuation, which would make it the biggest IPO ever, beating out Saudi Aramco’s 2019 record. In February, it completed an all-stock merger with xAI, valuing the combined entity at $1.25 trillion. The inclusion of Cursor as a potential acquisition makes SpaceX more than just a rocket and satellite company to investors, but an AI company (cnbc.com). 

Cursor, meanwhile, gets to work at the world’s largest cluster. Musk gets a story to tell shareholders, and whoever controls the coding assistant market in 2027 will have had a great 2026.