Musk Claims Cursor's New Model Is Based on K2.5 Fine-Tuning

MarsBitNews · 2026-03-20T12:28:45+00:00

Mars Finance News: Programming tool Cursor released its self-developed cutting-edge coding model Composer 2 early this morning, drawing widespread industry attention due to surpassing Claude Opus 4.6 in evaluations and its emphasis on cost-effectiveness. However, developers quickly discovered that Composer 2 is fine-tuned from Kimi K2.5. Elon Musk also posted on social media stating, "Yes, this is Kimi K2.5." This marks Musk calling out Kimi for the second time within a week.

MarsBitNews

2026-03-20 12:28:45

Mars Finance reports that the programming tool Cursor released its self-developed cutting-edge coding model Composer 2 early this morning. It attracted widespread industry attention for outperforming Claude Opus 4.6 in evaluations and emphasizing cost performance. However, some developers quickly discovered that Composer 2 is based on fine-tuned Kimi K2.5. Elon Musk also posted on social media stating, “Yes, this is Kimi K2.5.” This is the second time within a week that Musk has mentioned Kimi.

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