Cursor AI: Composer 2 Is Moonshot AI's Kimi K2.5
Cursor pitched Composer 2 as its own major breakthrough in AI coding, but the very next day its API returned the identifier kimi-k2p5-rl-0317-s515-fast. That revealed the model is built on Kimi K2.5 from Moonshot AI. A loud dispute followed over licensing, attribution, and why American AI products are increasingly built on Chinese open-source models.
AI-processed from Habr AI; edited by Hamidun News
Cursor AI's Composer 2 launch looked like a textbook unveiling of a new coding model: a proprietary benchmark, strong results, and a price that undercuts OpenAI and Anthropic. But on March 20, 2026, a single API response wrecked that narrative: the new name was hiding Kimi K2.5 from Moonshot AI.
When did the truth about Composer 2's base come out?
On March 20, 2026, a single Cursor API response broke the narrative by revealing that the new name was hiding Kimi K2.5 from Moonshot AI.
- Nov 1, 2026Local models lose to Opus and Codex: 0.21 on a MacBook versus 1.00 for Codex
- Nov 1, 2026Kimi scores 96.2% on a 1C database analytics test and emerges as a fallback if Claude access is blocked
- Nov 1, 2026OpenAI Rewrites GPT Behavior Rules: Five Values and a Chain of Command
- Oct 31, 2026Author puts his script before an AI jury: the verdict cost 850 thousand tokens
Build & Ship Production AI Agents Without Boilerplate Code
Start your free 72-hour trial at Hamidun Academy (academy.hamidun.com) — interactive lessons on Claude Code & Cursor, live Tech Radar, and production agent templates.
The AI world, distilled — once a week
Seven stories that actually mattered, hand-picked. No noise, no reposts, no press releases.
Done! Check your inbox for a confirmation.