Grok 3
Grok 3 combined live information retrieval, explicit reasoning, and a mass-market product entry in one model experience.
FAMILY / SPACEXAI
Grok
SpaceXAI’s frontier family emphasizing live tools, reasoning, coding, and long-running tasks.
- First model
- 2025
- Models
- 7
- Latest
- Grok 4.6
01 / LINEAGE MAP
Model lineage
predecessor derived from
02 / GENERATIONS
What changed
Grok 4
Scaled reinforcement learning beyond Grok 3 Reasoning with native tools, web search, and X search.
Grok 4 Fast
An efficient Grok 4 variant unifying reasoning and non-reasoning modes with 2M context and live search.
Grok 4.1
Used large-scale reinforcement learning to improve style, intent understanding, collaboration, and factuality in everyday conversation.
Grok 4.1 Fast
A 2M-context fast agent model for real-world tool use and deep research, offered in reasoning and non-reasoning variants.
Grok 4.5
A fast flagship for coding, agents, and knowledge work, available in Grok Build and the API.
Grok 4.6
Grok 4.6 reflects the migration of frontier-model evaluation from single-turn benchmarks toward multi-step project completion.