xAI's Grok 4.5, Co-Trained With Cursor, Offered Free to Cursor Users in Limited Promotion

Grok 4.5, the coding-focused frontier model jointly developed by xAI and the AI code editor Cursor, is being made available to Cursor users at no cost during a limited promotional window that requires no API key or credit card. The offer extends access to a model that Cursor and xAI say was co-trained on real developer interactions, positioning it as a high-value option for engineers working within their existing subscriptions.