Composer 3 / Vega
Cursor
What it is: The rumored next generation of Cursor's in-house agentic coding model.
Six Composer 3 variants codenamed Vega have reportedly appeared inside Cursor
An X leak claims six internal Vega variants have appeared. On 10 August the model was reportedly enabled briefly for some Cursor users, but no official release followed. Cursor has confirmed neither the name, configuration nor date.
The firmer signal is limited to ongoing work on the next Composer and an observed test. Cursor's official changelog contains no Composer 3 release. The claimed link to 1.5 trillion parameters and SpaceX compute remains unverified speculation.
Evidence and sources3 sources
The originating roundup for Vega and six variants. The author explicitly frames the 1.5T and SpaceX connection as personal speculation.
Reports a brief new-model enablement in Cursor followed by a teaser; the model identity is not officially confirmed.
A Cursor employee confirms work on the next Composer version, but does not mention Vega, six variants or timing.