Changes from previous version
A major capability step beyond Grok 4.1 Fast, with stronger long-horizon coding and tool use plus higher token efficiency for repository-scale and knowledge-work agents.
Release Summary
SpaceXAI's frontier model for coding, agentic tasks, and knowledge work, succeeding Grok 4.1 Fast. Grok 4.5 runs at up to 80 tokens per second, uses roughly half as many tokens as comparable models on agentic tasks, and is available in Grok Build, Cursor, and the API.
Timeline
July 8, 2026
Grok 4.5 released
SpaceXAI releases Grok 4.5 in Grok Build, Cursor, and its API as model grok-4.5.