xAI Unveils Grok 4.1 Fast Model and Agent API for Autonomous Enterprise Solutions

Details

• xAI introduces Grok 4.1 Fast, a cutting-edge large-language model designed for advanced tool use and agent-driven workflows.
• The model features a massive 2 million-token context window and utilizes long-horizon reinforcement learning for reliable, multi-turn conversations.
• Internal tests reveal leading accuracy in customer support, deep research, and other practical agentic applications.
• Pricing starts at $0.20 per million input tokens and $0.50 for output tokens, with both the model and new tools free for the first two weeks via OpenRouter.
• The new Agent Tools API enables developers to quickly implement autonomous web browsing, X post search, code execution, and document retrieval.
• Grok 4.1 Fast is now available through the xAI API and integrates with X for real-time information access.
• xAI is inviting developers to share early experiments on X, promoting open feedback for rapid innovation.

Impact

The 2 million-token context window surpasses OpenAI’s GPT-4o and closes in on Anthropic’s latest Claude models, raising the stakes in the race for longer AI contexts. Aggressive pricing and tight integration with X could shift market dynamics, pushing rivals to match on features or cost. The move strengthens Elon Musk’s cross-platform strategy, positioning xAI as a formidable force in the growing field of autonomous AI agents.