# Why does Grok 4.5 in Cursor only have a 256k context window? **URL:** \ **Category:** Help\ **Tags:** context, grok\ **Created:** [July 24, 2026, 3:08am UTC](https://forum.cursor.com/t/why-does-grok-4-5-in-cursor-only-have-a-256k-context-window/166519 "2026-07-24T03:08:08Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\ **Post date:** [July 26, 2026, 10:35am UTC](https://forum.cursor.com/t/why-does-grok-4-5-in-cursor-only-have-a-256k-context-window/166519/5 "2026-07-26T10:35:18Z")
Hey, thanks for the request. There’s an important detail here: the native Grok 4.5 from xAI really does come with a 500k context window, but the model called Cursor Grok 4.5 in Cursor is a separate model, and its context window is 256k by design. So it’s not the same 500k model that we trimmed down, it’s a different configuration. 256k is expected behavior here, not a bug. About expanding the window and launching new first-party models with a larger context, I can’t share specific plans or timelines yet. We’ll post any model updates here on the forum. Related thread with the same request: [The wrong context window size of Cursor Grok 4.5](https://forum.cursor.com/t/the-wrong-context-window-size-of-cursor-grok-4-5/165224) --- _[View the full topic](https://forum.cursor.com/t/why-does-grok-4-5-in-cursor-only-have-a-256k-context-window/166519)._