OPINION: Cursor Called It In-House. It Was Built in Beijing.
Cursor launched Composer 2 on March 19 and called it an in-house model. A developer found the actual model ID within 24 hours: kimi-k2p5-rl-0317-s515-fast. The $29.3 billion code editor was running Moonshot AI's Kimi K2.5, built in Beijing by a company the U.S. Commerce Department flagged for national security risks. Anthropic accused Moonshot of siphoning 16 million prompts from Claude. Cursor called the omission a mistake. It was the second time in four months.
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