Composer 3 / Vega

Six Composer 3 variants codenamed Vega have reportedly appeared inside Cursor

Vega and Composer 3 appear in reports about internal testing. The checked Cursor changelog through September 2 has no separate model release; timing and specifications remain unconfirmed.

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