xAI
✓ VerifiedCreator of the Grok model family, focused on real-time knowledge and reasoning.
At a glance
Overview
xAI is an American AI company founded by Elon Musk in March 2023 after his departure from OpenAI's board. Musk has positioned xAI as building "maximally truth-seeking AI" and has been outspoken in his criticism of OpenAI's direction.
Grok
xAI's flagship product is Grok, a chatbot integrated into the X (formerly Twitter) social platform. Grok is unique among major chatbots for its real-time access to X data and its more permissive content policies.
- Grok 1 (Nov 2023) — first release, later open-weighted
- Grok 2 (Aug 2024) — multimodal upgrade
- Grok 3 (Feb 2025) — trained on the Colossus supercluster
- Grok 4 (2025) — current flagship reasoning model
Colossus
In September 2024, xAI brought online Colossus, a 100,000-GPU H100 supercluster in Memphis, Tennessee — built in 122 days and described as the largest contiguous AI training cluster in the world. xAI has announced plans to expand it to 1 million GPUs.
Twitter/X relationship
xAI acquired X (the social network) from Elon Musk in March 2025 in an all-stock deal valuing X at US$33 billion and xAI at US$80 billion, creating xAI Holdings.
Latest news from xAI
8 most recent · auto-synced from RSSIs Grok Down Now? Grok AI Experiences Intermittent Outages Amid High Demand on April 23 2026 - International Business Times Australia
Is Grok Down Now? Grok AI Experiences Intermittent Outages Amid High Demand on April 23 2026 International Business Times Australia
SpaceX says it can buy AI coding tool Cursor for $60B later this year - AP News
SpaceX says it can buy AI coding tool Cursor for $60B later this year AP News
Latest activity
Full history →- 0
xAI: Grok 3 Mini Beta released
xAI: Grok 3 Mini Beta discovered via OpenRouter. Provider: xAI.
Grok 3 Mini Beta
Releases timeline
Showing 8 most recent- Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...
- Grok 4.20
Grok 4.20 is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently...
- Grok 4.1 Fast
Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using...
- Grok Code Fast 1
Grok Code Fast 1 is a speedy and economical reasoning model that excels at agentic coding. With reasoning traces visible in the response, developers can steer Grok Code for high-quality...
Active models
- Grok 4.20 Multi-AgentActive
Grok 4.20 Multi-Agent is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...
2M ctx - Grok 4.20Active
Grok 4.20 is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently...
2M ctx - Grok 4.1 FastActive
Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window. Reasoning can be enabled/disabled using...
Older & deprecated (1)
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