{"id":718344,"date":"2026-03-23T04:15:12","date_gmt":"2026-03-23T01:15:12","guid":{"rendered":"https:\/\/buradabiliyorum.com\/en\/cursor-admits-its-new-coding-model-was-built-on-top-of-moonshot-ais-kimi\/"},"modified":"2026-03-23T04:15:12","modified_gmt":"2026-03-23T01:15:12","slug":"cursor-admits-its-new-coding-model-was-built-on-top-of-moonshot-ais-kimi","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/cursor-admits-its-new-coding-model-was-built-on-top-of-moonshot-ais-kimi\/","title":{"rendered":"Cursor admits its new coding model was built on top of Moonshot AI\u2019s Kimi"},"content":{"rendered":"
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AI coding company Cursor launched a new model this week called Composer 2, which it promoted<\/a> as offering \u201cfrontier-level coding intelligence.\u201d\u00a0<\/p>\n

However, an X user posting under the name Fynn soon claimed<\/a> that Composer 2 was \u201cjust Kimi 2.5\u201d with additional reinforcement learning \u2014 Kimi 2.5 being an open source model recently released by Moonshot AI, a Chinese company backed by Alibaba and HongShan (formerly Sequoia China).\u00a0<\/p>\n

As evidence, Fynn pointed to code that seemed to identify Kimi as the model.<\/p>\n

\u201c[A]t least rename the model ID,\u201d they scoffed.<\/p>\n

It was a surprising revelation, since Cursor is a well-funded U.S. startup that raised a $2.3 billion round last fall at a $29.3 billion valuation, and is reportedly exceeding $2 billion in annualized revenue. Also, the company didn\u2019t mention anything about Moonshot AI or Kimi in its announcement.<\/p>\n

However, Cursor\u2019s vice president of developer education Lee Robinson soon acknowledged<\/a>, \u201cYep, Composer 2 started from an open-source base!\u201d But he said, \u201cOnly ~1\/4 of the compute spent on the final model came from the base, the rest is from our training.\u201d As a result, he said Composer 2\u2019s performance on various benchmarks is \u201cvery different\u201d from Kimi\u2019s.<\/p>\n

Robinson also insisted that Cursor\u2019s use of Kimi was consistent with the terms of its license, a point the Kimi account on X repeated in a subsequent post congratulating Cursor<\/a>, where it said Cursor used Kimi \u201cas part of an authorized commercial partnership\u201d with Fireworks AI.<\/p>\n

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Techcrunch event<\/p>\n

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\n\t\t\t\t\t\t\t\t\tSan Francisco, CA<\/span>
\n\t\t\t\t\t\t\t\t\t\t\t\t\t|<\/span>
\n\t\t\t\t\t\t\t\t\t\t\t\t\tOctober 13-15, 2026<\/span>\n\t\t\t\t\t\t\t<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

\u201cWe are proud to see Kimi-k2.5 provide the foundation,\u201d the Kimi account said. \u201cSeeing our model integrated effectively through Cursor\u2019s continued pretraining & high-compute RL training is the open model ecosystem we love to support.\u201d<\/p>\n

So why not acknowledge Kimi upfront? Beyond any potential embarrassment in not creating a model from scratch, building on top of a Chinese model might feel particularly fraught right now, with the so-called AI \u201carms race\u201d often framed as an existential battle between United States and China. (See, for example, Silicon Valley\u2019s app<\/a>arent panic after Chinese company DeepSeek released a competitive model early last year.)<\/p>\n

Cursor co-founder Aman Sanger acknowledged<\/a>, \u201cIt was a miss to not mention the Kimi base in our blog from the start. We\u2019ll fix that for the next model.\u201d<\/p>\n<\/div>\n

If you liked the article, do not forget to share it with your friends. Follow us on\u00a0Google News<\/a><\/span>\u00a0too, click on the star and choose us from your favorites.<\/span><\/strong><\/p><\/blockquote>\n

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If you want to read more like this article, you can visit our Technology<\/a><\/span> category.<\/strong><\/p>\n<\/blockquote>\n

Source<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

AI coding company Cursor launched a new model this week called Composer 2, which it promoted as offering \u201cfrontier-level coding intelligence.\u201d\u00a0 However, an X user posting under the name Fynn soon claimed that Composer 2 was \u201cjust Kimi 2.5\u201d with additional reinforcement learning \u2014 Kimi 2.5 being an open source model recently released by Moonshot…<\/p>\n","protected":false},"author":1,"featured_media":718345,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/techcrunch.com\/wp-content\/uploads\/2025\/07\/opengraph-image.png?w=1200","fifu_image_alt":"","footnotes":""},"categories":[18],"tags":[77337,154765,95241,160758,70917],"class_list":["post-718344","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-ai","tag-cursor","tag-kimi","tag-moonshot-ai","tag-startups"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/718344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=718344"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/718344\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/718345"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=718344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=718344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=718344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}