Sonoma Dusk Alpha (stealth)
Faster sibling of Sonoma Sky, 2M context; revealed as an early test version of Grok 4 Fast.
This is a cloaked model provided to the community to gather feedback. 2,000,000 token context window.
Source
Sonoma Dusk Alphaopenrouter.ai · published
Revealed as
Sonoma Dusk Alpha were early test versions of Grok 4 Fast, which is free to use for a limited time.”