New Models
Grok 4.5
SpaceXAI launches Grok 4.5, a coding-and-agents model trained with Cursor
The first flagship under the unified SpaceXAI brand (xAI dissolved into it two days earlier): a 1.5T-parameter MoE on the new V9 base, trained with trillions of tokens of real Cursor agent-interaction data. The pitch is efficiency: 83.3% on Terminal-Bench 2.1 while using about a quarter of the output tokens Opus 4.8 needs per solved SWE-Bench Pro task, at $2/$6 per million. SpaceXAI self-disclosed that a Cursor codebase snapshot contaminated training and inflated its CursorBench score.
$2/$6 Per 1M tokens (in/out)83.3% Terminal-Bench 2.11.5T Total parameters (MoE)