Grok Fast

xAI · lightweight line

2 releases since 2025Latest: Grok 4.1 Fast

Where the line stands

How long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

xAI · Grok Fast line · lightweight

Quiet296 days without a release — longer than any past gap

Days since last release

Grok 4.1 Fast · Nov 17, 2025

296

days

Usual gap

days

Recent gaps

Grok 4.1 Fast · Nov 2025

Newest first — what each version changed versus the one before, in xAI's own numbers.

Nov

Sep

One email a week: what AI models shipped, the actual differences vs the previous version, and what's coming next. No filler.