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%) ... Read more
Science
Anthropic Used Cursor Use Data to Get Ahead, So SpaceXAI Will Use Cursor to Get Ahead
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%) ... Read more
Brian Wang
June 18, 2026
1 min read
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