An unreleased Grok 4.6 briefly appeared in Cursor's model picker today, labeled "Cursor Grok 4.6 Fast." The listing is aimed at complex, long-running agentic coding tasks, and the interface shows a 256K context window and a "high effort" mode.
But selecting the model doesn't actually work. This looks more like an accidental early appearance than a real launch.
Musk previously said Grok 4.6 is a 1.5-trillion-parameter model, with the upgrade focused on supervised fine-tuning and reinforcement learning. He initially teased a release around August 7 — and then, on SpaceX...