Lab release history
Last updated May 6, 2026
xAI model releases
Elon Musk's lab behind the Grok family. This page collects the lab's model releases, lifecycle events, source links, and model metadata in one crawlable record.
Most recent in this set
6 models
Grok 4.3
AvailablexAI's agentic flagship with a 1M-token context and aggressive API pricing.
Grok 4
DeprecatedxAI's fourth-generation Grok line, preceding the later 4.x API updates already tracked in the catalog.
Grok 3
DeprecatedxAI's third-generation model family, introduced with stronger reasoning, search, and coding modes.
Grok-2
RetiredSecond-generation Grok release with Grok-2 and Grok-2 mini for chat, coding, reasoning, and image-enabled product experiences.
Grok-1.5
RetiredGrok update with stronger reasoning and a 128K context window.
Grok-1
AvailablexAI's first Grok model, later released as open weights with a 314B-parameter MoE checkpoint.