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xAI releases Grok 4.1 Fast model and Agent Tools API
xAI has released the next-generation model Grok 4.1 Fast, featuring a context window of 2 million tokens, optimized for customer support and Depth research applications, supporting tool calls and web browsing functionalities. The model has an open API, priced at $0.2 per million tokens input and $0.5 output, and will be available for free trial on the OpenRouter platform.

