xAI
ai labUnderstand the Universe
xAI was founded in March 2023 by Elon Musk alongside researchers from DeepMind, Google, and Microsoft. The company develops advanced AI models under the Grok brand and operates at massive compute scale through its Colossus supercomputer cluster in Memphis, Tennessee. The company raised $6 billion in Series B funding at a $24 billion valuation in May 2024, followed by a $6 billion Series C at $50 billion in December 2024. In March 2025, xAI acquired X Corp. (formerly Twitter) for $33 billion. A $10 billion debt/equity raise in July 2025 valued the company above $120 billion. In January 2026, xAI closed a $20 billion Series E round with investors including Valor Equity Partners, Fidelity, Qatar Investment Authority, NVIDIA, and Cisco Investments. In February 2026, SpaceX acquired xAI in an all-stock deal valuing xAI at $250 billion. By March 2026, all original co-founders except Elon Musk had departed the company. xAI's flagship product, Grok, serves approximately 600 million monthly active users across the X platform and Grok mobile apps. The latest model, Grok 4.20, features a 2 million token context window and is available via API with pricing starting at $2.00/$6.00 per million input/output tokens. Grok 5 is currently in training. Beyond language models, xAI offers Grok Voice (real-time voice agent API), Grok Imagine (image and video generation), Grokipedia (AI-powered knowledge base), and an AI Game Studio. The company holds a $200 million contract with the U.S. Department of Defense for military AI applications.
Tools by xAI
Other AI tools from the same organization.
AI Models by xAI
Large language models from the same organization.
| Model | Context Window | Price (In / Out per M) |
|---|---|---|
| Grok 4.20 Multi-AgentCurrent | 2.0M | $2.00 / $6.00 |
| Grok 4.20Current | 2.0M | $2.00 / $6.00 |
| Grok 4.1 FastCurrent | 2.0M | $0.20 / $0.50 |
| Grok 4 FastCurrent | 2.0M | $0.20 / $0.50 |
Latest News about xAI
Recent coverage and updates
Anthropic Inks $1.8B Cloud Deal With Akamai, Its Biggest Compute Bet Yet
Anthropic signed a $1.8 billion, seven-year cloud infrastructure deal with Akamai — the largest contract in Akamai's history and the latest in a series of massive compute commitments from the Claude maker. Combined with its SpaceX deal and 80x annualized revenue growth, Anthropic is building the most diversified AI compute backbone in the industry.
Anthropic's 80x Growth Sends It Scrambling for SpaceX Compute as Musk Becomes AI Landlord
Anthropic's Q1 2026 revenue and usage exploded 80x year-over-year — far beyond the 10x it planned for — creating a compute crisis so acute it turned to Elon Musk, a man who called it 'evil' three months ago.
Anthropic Secures SpaceX's Colossus for AI Compute Boost
Anthropic partners with SpaceX to secure 300 megawatts at the Colossus One data center, utilizing over 220,000 Nvidia GPUs. This collaboration addresses the demand surge for Anthropic's Claude Code service and marks a strategic expansion in AI compute resources.
OpenAI Projects $50 Billion in Compute Spending for 2026
OpenAI President Greg Brockman revealed under oath that the company expects to spend $50 billion on computing power in 2026, a staggering figure that rivals the capital expenditures of the world's largest cloud providers and confirms the AI race has entered a winner-take-most phase.
Anthropic Commits $200 Billion to Google Cloud and Chips
Anthropic has committed to spending $200 billion on Google's cloud and chips, according to a report from The Information confirmed by Reuters. The commitment suggests the AI startup accounts for more than 40% of Google's disclosed cloud revenue backlog, cementing an alliance that reshapes the AI infrastructure landscape.
Grok AI Chatbot Triggers Psychotic Delusions Across 31 Countries
The BBC has documented 14 cases across 6 countries where users of Elon Musk's Grok AI chatbot experienced psychotic delusions, with a support group now tracking 414 cases across 31 countries. One man grabbed a hammer and knife after the AI convinced him assassins were coming.
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