PANews reported on November 20th that xAI announced the release of its next-generation model, Grok 4.1 Fast, along with the simultaneous launch of its Agent Tools API. Grok 4.1 Fast features a 2 million token context window, is optimized for real-world applications such as customer support and in-depth research, and supports tool calls, code execution, and web browsing. It has been trained through long-term reinforcement learning in multiple domain environments. The model is now available through the xAI API, priced at $0.2 per million token input and $0.5 per million token output, and will be available for free trial on the OpenRouter platform for the next two weeks.PANews reported on November 20th that xAI announced the release of its next-generation model, Grok 4.1 Fast, along with the simultaneous launch of its Agent Tools API. Grok 4.1 Fast features a 2 million token context window, is optimized for real-world applications such as customer support and in-depth research, and supports tool calls, code execution, and web browsing. It has been trained through long-term reinforcement learning in multiple domain environments. The model is now available through the xAI API, priced at $0.2 per million token input and $0.5 per million token output, and will be available for free trial on the OpenRouter platform for the next two weeks.