explainx.ai coverage treats SuperGrok Heavy as the highest Grok entitlement, distinct from a standard SuperGrok seat. It has gated Grok Build Mode (Early Beta) and Grok Bot early beta, often listed alongside Cursor Ultra and Cursor Teams Premium. It is a Grok-plan name, not a Cursor Auto routing mode. An August 19, 2026 X recap of Cursor's usage-limit email claimed Ultra via SuperGrok Heavy was included in Cursor's bigger included-usage pool; Cursor's Team email itself did not name the tier.