Grok 4.5 just COOKED Claude and OpenAI
Wes Roth
Jul 9, 2026
The acquisition of Cursor by xAI has produced Grock 4.5, a highly efficient coding model that rivals frontier-level performance at a fraction of the cost. By pairing a master-architect model like Fable 5 with the task-execution speed of Grock 4.5, developers can now build complex, multi-district 3D environments for pennies.
Key insight: The host successfully architected a massive, multi-district 3D city using Fable 5 to write the specifications and Grock 4.5 to execute the code, completing the task for approximately eight dollars—or less than the price of a burrito.
