Grok 4.1 Fast
xAI
Timeline
- · API availability · evidence link
- · Evidence links · xAI · release notes
Excerpt
You can now use Grok 4.1 Fast in the xAI Enterprise API
Signals 1
Specifications
Grok 4.1 Fast is a model from xAI, released on 19 Nov 2025.
Questions
When was Grok 4.1 Fast released?
On 19 Nov 2025.