GROK 4.5 errors out

[Clvrwrk (Christopher Hussey)]

Where does the bug appear (feature/product)?

Cursor for iOS

Describe the Bug

Report it with your Request ID: 976b60f9-b885-48d0-978e-d76163f1ce2c
(forum.cursor.com or in-app support — they can look up that ID)

Steps to Reproduce

Yes, I can’t use GROK via Cursor Desktop

Expected Behavior

I should be able to chat with GROK 4.5

Screenshots / Screen Recordings

Operating System

MacOS

Version Information

Cursor Ios Desktop app

Does this stop you from using Cursor

No - Cursor works, but with this issue

[Xiaodong_Wang]

mee to

[Mitch_Ivin]

same issue here

[KhanhDo (Niteco)]

Meanwhile I was using Grok and suddenly I got this bug and cannot use Cursor Grok any longer .

[KhanhDo (Niteco)]

It works now. I think when the incident happened, It was because Cursor was updating the model name (added the “cursor” prefix).

[zhang_kevin]

Found that cursor-grok-4.5-high-fast is significantly slower than grok-4.5-fast-xhigh, and its token usage has doubled.

[Colin]

Hey all,

During last night’s slug migration, some existing chats were affected.

What's the difference between 'grok-4.5-fast-xhigh' and 'cursor-grok-4.5-high-fast'?

Hey everyone! Yesterday, we renamed some slugs to match what you see in the UI (High effort in the UI for Grok 4.5 was previously backed by the slug grok-4.5-xhigh, and is now cursor-grok-4.5-high). To be clear: this is purely a naming change he the there should be no impact to billing or performance. Keep in mind that because token types (Input, Cache Read, and Output) bill at different rates, it’s not possible to directly compare a total token count across models. Below is how the slugs cha…

To resolve this, simply reselect the model or start a new chat, and everything should be back in line!