Quoting Kimi.ai @Kimi_Moonshot

Simon Willison’s Weblog Subscribe Sponsored by: WorkOS — The infrastructure fast-growing B2B companies use to sell to Enterprise. Congrats to the @cursor_ai team on the launch of Composer 2! We are proud to see Kimi-k2.5 provide the foundation. Seeing our model integrated effectively through Cursor's continued pretraining & high-compute RL training is the open model ecosystem we love to support. Note: Cursor accesses Kimi-k2.5 via @FireworksAI_HQ hosted RL and inference platform as part of an authorized commercial partnership. — Kimi.ai @Kimi_Moonshot, responding to reports that Composer 2 was built on top of Kimi K2.5 Posted 20th March 2026 at 8:29 pm Recent articles Thoughts on OpenAI acquiring Astral and uv/ruff/ty - 19th March 2026 GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52 - 17th March 2026 My fireside chat about agentic engineering at the Pragmatic Summit - 14th March 2026 This is a quotation collected by Simon Willison, posted on 20th March 2026. ai 1920 generative-ai 1702 llms 1668 cursor 13 ai-in-china 91 kimi 8 Disclosures Colophon © 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026