xAI released Grok 4.5 flagship model on July 9, 2026

xAI launched Grok 4.5 on July 8, 2026, calling it the company's smartest model yet for coding, agentic tasks, and knowledge work, xAI said on July 8, 2026. The model is available starting July 8 in Grok Build, Cursor on all plans, and the SpaceXAI console. Grok 4.5 is priced at $2 per million input tokens and $6 per million output tokens. xAI said the model resolves SWE Bench Pro tasks with 15,954 output tokens on average, about 4.2 times fewer than Opus 4.8 (max) at 67,020, and is served at 80 tokens per second. The model was trained across tens of thousands of NVIDIA GB300 GPUs with heavy investment in data filtering and curation. xAI noted Grok 4.5 is not yet available in the EU in any SpaceXAI products or the API console, with EU availability expected in mid-July.