Cursor Used Kimi K2.5 (a Chinese AI Model) Without Disclosure — Why Every Developer Should Care

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I want to tell you about the moment I stopped trusting AI tool announcements. It was March 19th. Cursor had just launched Composer 2. The benchmarks were extraordinary - 61.7% on Terminal-Bench 2.0, beating Claude Opus 4.6 at one-tenth the price. The announcement called it their "first continued pre