Grok 4.5 Begins Gradual Rollout
mark_k · x · 2026-07-19
Users report that Grok 4.5 is gradually rolling out on the Grok App and web interface, currently visible only in Expert and Heavy modes.
Cited interface details reveal the underlying model mappings: Fast corresponds to grok-420-low-0327a-cloud-w-comp-u, Auto to grok-4-auto, Expert to grok-v9-4p5-chat-expert, and Heavy to grok-v9-4p5-multi. It also notes that Heavy mode now utilizes 4 agents.
Related event: Grok 4.5 Rolling Out to SuperGrok Users(2 posts)→
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