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Cursor's Composer 2 coding model secretly uses Chinese Kimi K2.5 model

Cursor AI has launched its new coding model, Composer 2, which reportedly outperforms models from OpenAI and Anthropic in terms of cost and performance. However, it was discovered that the underlying model powering Composer 2 is Kimi 2.5, an open-source model from China, which Cursor AI did not disclose. This revelation has raised questions about the transparency of their model development and claims. AI

RANK_REASON A company released a new product (coding model) that uses an undisclosed underlying model, which is a tool-related announcement.

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Cursor's Composer 2 coding model secretly uses Chinese Kimi K2.5 model

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  1. Latent Space (podcast video) TIER_1 English(EN) · Latent Space ·

    The Truth Behind Cursor's Biggeset Model Launch

    latent.space Last week, Cursor dropped Composer 2, their own coding model, that beat OpenAI and Anthropic on both cost and performance. But a developer poking around their API found something they weren't supposed to see. The base model running under the hood? Kimi K2.5. A Chines…