Insider Jason Calcanis said Anthropic stabbed Cursor in the back. Anthropic allegedly used massive Cursor user data/token consumption to train and improve their own internal coding capabilities (Claude Code or similar). They then restricted or cut off Cursor’s access to their models.

This left Cursor in a terrible position. Negative gross margins (reported around -23%) due to expensive inference costs + no reliable access to a top-tier coding model.
Cursor was burning cash on compute and struggling to roll their own models without enough infrastructure.

SpaceX acquires Cursor for $60 billion in shares. It’s described as incredibly cheap at roughly 15x revenue.
SpaceX provides Cursor with unlimited compute (leveraging their massive infrastructure, including power/compute resources like Colossus).
The deal gives SpaceX/Elon control of a critical developer tool/IDE while solving Cursor’s model and compute problems.

If Anthropic trained Claude mainly using Cursor data then it makes sense that their is enough data for Cursor and XAI to make a same class model using that data.