--- title: Did Cursor really just rebrand Kimi??? | daily.dev description: Cursor's new Composer 2 model was discovered to be built on top of Kimi K2.5, an open-weight model from Moonshot AI, without clear public disclosure. The model... canonical: https://daily.dev/posts/did-cursor-really-just-rebrand-kimi--bgifstgcf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Did Cursor really just rebrand Kimi??? | daily.dev og:description: Cursor's new Composer 2 model was discovered to be built on top of Kimi K2.5, an open-weight model from Moonshot AI, without clear public disclosure. The model... og:url: https://daily.dev/posts/did-cursor-really-just-rebrand-kimi--bgifstgcf og:image: https://api.daily.dev/og/posts/BgifSTgcf.png og:image:alt: Did Cursor really just rebrand Kimi??? og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Did Cursor really just rebrand Kimi??? **[Theo - t3․gg](https://daily.dev/sources/t3dotgg)** · 27 min read · 1 upvotes · 0 comments ## Summary Cursor's new Composer 2 model was discovered to be built on top of Kimi K2.5, an open-weight model from Moonshot AI, without clear public disclosure. The model name was found embedded in Cursor's API URLs, sparking controversy. Cursor used Fireworks AI as an inference partner to technically comply with Kimi's modified MIT license, which requires prominent attribution for large commercial products. Cursor applied roughly 3x additional compute in post-training and reinforcement learning on top of Kimi K2.5, resulting in a model that performs at GPT-5 tier for coding tasks at 10x lower cost than Claude Opus. The author criticizes Cursor's lack of transparency while acknowledging the technical achievement, and warns that this incident may discourage smaller labs from releasing open-weight models in the future. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Cursor admits its new coding model was built on top of Moonshot AI’s Kimi](https://daily.dev/posts/cursor-admits-its-new-coding-model-was-built-on-top-of-moonshot-ai-s-kimi-2o2hmwwmm) · TechCrunch · 1 upvotes · 0 comments --- Tags: [#reinforcement-learning](https://daily.dev/tags/reinforcement-learning), [#ai-coding](https://daily.dev/tags/ai-coding) [View this post on daily.dev](https://daily.dev/posts/did-cursor-really-just-rebrand-kimi--bgifstgcf) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Did Cursor really just rebrand Kimi???","url":"https://daily.dev/posts/did-cursor-really-just-rebrand-kimi--bgifstgcf","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/did-cursor-really-just-rebrand-kimi--bgifstgcf"},"datePublished":"2026-03-22T17:52:40.878Z","dateModified":"2026-03-22T19:27:31.005Z","description":"Cursor's new Composer 2 model was discovered to be built on top of Kimi K2.5, an open-weight model from Moonshot AI, without clear public disclosure. 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