Composer 3 / Vega

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.

Sources

@LuminaBench: Composer 3 / Vega leak summaryThe originating roundup for Vega and six variants. The author explicitly frames the 1.5T and SpaceX connection as personal speculation.Open primary source TestingCatalog: brief Composer 3 / Grok test in CursorReports a brief new-model enablement in Cursor followed by a teaser; the model identity is not officially confirmed.Open primary source Cursor: continued investment in the next ComposerA Cursor employee confirms work on the next Composer version, but does not mention Vega, six variants or timing.Open primary source