Composer 2.5 is built on the same open-source base as Composer 2, Moonshot’s Kimi K2.5.

Composer 2.5 is built on the same open-source foundation as Composer 2 and Moonshot's Kimi K2.5 model. This indicates technical alignment and shared architecture between these AI systems developed by related or partnered organizations. The update suggests incremental improvements while maintaining compatibility with the underlying open-source base.

Source: Kimi/Moonshot (X) | 2026-05-18