(San Francisco, CA) - AI code editor Cursor announced Copus 5.0 on Thursday, which the company called "our most advanced proprietary, home-grown model yet, trained on our proprietary Copium A100 GPU hardware."
Developers on X discovered within minutes that Copus 5.0's API responses contained a base_model field reading kimi-k2.5-278B. Cursor's VP of Model Provenance called the field "a placeholder left in by an intern".
"We truly do stand on the shoulders of giants," he later clarified. "It's incredible to see the ways in which openness and sharing can accelerate us all towards a brighter and more intelligent future. With that in mind, we also wanted to share how excited we are about our continued revenue growth, which is definitely going up and not something we are concerned about whatsoever."
"$30 a month for a reskinned Kimi 2.5 is...something, I guess. At least when I pay Anthropic $200 / month for Max, I know they actually made the model and it will get better," one user said.
Our senior reporter Sofia Del Repo was on-site at the reveal party. "Would you say that you're also standing on the shoulders of the VS Code team?" she asked. The Cursor team did not respond.
