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Cursor's new Composer 2.0 is apparently based on Kimi2.5

Reddit r/LocalLLaMA / 3/20/2026

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Key Points

  • Cursor's Composer 2.0 reportedly references a Kimi-based model path (kimi-k2p5-rl-0317-s515-fast) in chat completions, implying Composer 2.0 may be built on Kimi 2.5.
  • Public reactions include Elon Musk's roasting claiming it’s Kimi 2.5, with mentions of replies from Kimi contributors, though some details are unverified in the post.
  • Licensing notes suggest a modified MIT license would need a clear statement that Composer is based on Kimi 2.5, raising potential compliance questions.
  • The piece relies on Reddit threads and social media screenshots rather than an official Cursor/Kimi announcement, so several claims remain unconfirmed.

This guy has found Cursor sends `accounts/anysphere/models/kimi-k2p5-rl-0317-s515-fast` in /chat/completions request when using Composer 2.0.

https://x.com/fynnso/status/2034706304875602030

Musk already joined the roasting claiming it's Kimi 2.5 https://x.com/elonmusk/status/2034941631871455262?s=20

There're also screenshots of replies from Kimi folks including Yulun Du but I somehow don't see them in twitter feed, so not sure if fakes, won't include here.

Regarding the license: modified MIT didn't require much else from Cursor but to clearly state it's based on Kimi 2.5.

submitted by /u/bakawolf123
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