""We've evaluated a lot of base models on perplexity-based evals and Kimi k2.5 proved to be the strongest!" said Cursor's cofounder Aman Sanger on X on Saturday."
""It was a miss to not mention the Kimi base in our blog from the start," he added."
""Only ~1/4 of the compute spent on the final model came from the base, the rest is from our training," Robinson said."
""Seeing our model integrated effectively through Cursor's continued pretraining & high-compute RL training is the open model ecosystem we love to support," the post read."
Cursor's Composer 2 coding model is built on Kimi K2.5, an open-source model from Moonshot AI. The omission of this detail was acknowledged by Cursor executives after user scrutiny. Co-founder Aman Sanger admitted it was a mistake not to mention Kimi in earlier communications. Cursor's vice president, Lee Robinson, confirmed that only a quarter of the compute for Composer 2 came from Kimi, with the rest from their own training. The Chinese startup stated that Cursor is using Kimi under an authorized commercial partnership.
Read at www.businessinsider.com
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