Grok 4.8 has reportedly appeared in Cursor’s server-side model list, alongside identifiers that look like effort or speed variants. In a post on X, @LuminaBench attributed the sighting to a Magpie commit and described it as preparation for the next Grok release. Source on X: https://x.com/LuminaBench/status/2104505848223461846

The report does not show that Grok 4.8 is available in Cursor. It also does not establish a release date or prove that users can select any of the listed identifiers.

What was reportedly spotted in Cursor’s model list

LuminaBench said the server-side list includes grok-4.8, along with three related CLI-style identifiers:

  • grok-4.8-high

  • grok-4.8-high-fast

  • grok-4.8-xhigh-fast

The supplied screenshot describes a distinction between the broader grok-4.8 family name and a CLI request for an effort or speed variant. That supports reading the names as model-related labels, but it does not establish how the variants work or whether they are exposed to Cursor users.

Screenshot distinguishes the reported Grok 4.8 family name from a CLI effort and speed variant.
Screenshot distinguishes the reported Grok 4.8 family name from a CLI effort and speed variant.

Image credit: @LuminaBench on X

What the reported variants show

The names appear to indicate different effort or speed configurations, although the source does not explain their exact behavior. They should therefore be treated as reported identifiers rather than confirmed user-facing modes.

The listing also provides no supported information about the variants’ capabilities, performance, pricing or access rules. Their appearance does not by itself show that the model is finished, selectable or operating in a public Cursor integration.

Is Grok 4.8 available yet?

No availability conclusion follows from this sighting. LuminaBench repeatedly clarified that the entry was a sighting of preparation, not evidence that Grok 4.8 had launched or that its release was close.

A server-side model list can be consistent with a company preparing support for a model or reserving names for future use. On its own, however, it cannot establish public access, a completed integration or a release announcement from xAI.

Does the listing indicate when Grok 4.8 will launch?

It does not provide a reliable timeline. LuminaBench gave personal guesses of weeks to about a month, while repeatedly saying the listing looked like preparation rather than a signal of an imminent launch.

Those comments are speculation, not a release schedule. Based on the reported listing alone, the most that can be said is that Grok 4.8-related identifiers were reportedly present in Cursor’s server-side preparation. The timing and public availability remain unconfirmed.

Sources