4th paragraph in license block
Our only modification part is that, if the Software (or any derivative works thereof) is used for any of your commercial products or services that have more than 100 million monthly active users, or more than 20 million US dollars (or equivalent in other currencies) in monthly revenue, you shall prominently display "Kimi K2.5" on the user interface of such product or service.
Cursor have said they are using Composer through their inference provider (Fireworks). Presumably the MIT is not viral like the GPL, so Cursor, and companies that use Cursor do not need to display Kimi attribution on their products.
It's definitely not what Kimi wanted, but it sounds like this is what is written.
My first reaction was "well, who knows how much revenue they're actually doing"
But at least the rumor mill has them significantly above that line:
> Revenue: As of March 2026, reports suggest Cursor has surpassed $2 billion in annualized revenue (ARR).