ChainThink report: Grok 4.6, not yet officially released, briefly appeared in Cursor's model list today, labeled on the page as "Cursor Grok 4.6 Fast."

The model is primarily targeted at complex, long-running Agent programming tasks, with the interface displaying both 256K context and high effort mode, though it remains non-callable upon selection. This appears to be a premature leak rather than an official launch.

Elon Musk previously stated that Grok 4.6 is a 1.5 trillion parameter model, with key upgrades centered on supervised fine-tuning and reinforcement learning; he initially announced a release around August 7th, later revising the timeline to potentially this week.