SpaceXAI just released Grok 4.5. The company calls it its smartest model to date. It targets coding, agentic tasks, and knowledge work. SpaceXAI says Grok 4.5 was trained alongside Cursor, an AI coding editor.
TL;DR
Grok 4.5 targets coding, agentic tasks, and knowledge work, trained alongside Cursor.
In SpaceXAI’s own chart, Fable (max) leads all four benchmarks; Grok 4.5 is closest on Terminal Bench 2.1.
Token efficiency is the standout: about 4.2× fewer output tokens than Opus 4.8 (max) on SWE Bench Pro.
