Overview
- Vice president Lee Robinson said roughly one-quarter of the final model’s training compute came from the Kimi base and the remainder from Cursor’s own training.
- Moonshot AI’s Kimi account stated the use is authorized through a commercial partnership facilitated by Fireworks AI.
- Co-founder Aman Sanger acknowledged the omission of Kimi in the launch blog and said the company will address provenance more clearly in future model announcements.
- The disclosure followed an X post by developer Fynn, who surfaced an internal identifier referencing Kimi K2.5 within Cursor’s API responses.
- Composer 2 is marketed as frontier-level for coding and is priced at $0.50 per million input tokens and $2.50 per million output tokens, significantly undercutting leading rivals’ rates.