Introducing Grok 4 Fast, a multimodal reasoning model with 2M context windows, setting a new benchmark for cost-effective intelligence. Free for iOS and Android apps and on OpenRouter. According to @ArtificialAnlys, Grok 4 Fast has set a new record in Pareto Intelligence. In collaboration with @lmarena_ai, we evaluated Grok 4 Fast on Search and Text Arena, where it ranked first and eighth, respectively. Grok 4 Fast is now available to all users of the iOS and Android apps in both Fast and Automatic modes. All users, including free users, have unrestricted access to our latest model, marking a significant step towards democratizing advanced AI. For a limited time, Grok 4 Fast will be free for OpenRouter and the Vercel AI Gateway. Grok 4 Fast is now officially available through the xAI API, starting at $0.20 per 1 million input tokens and $0.50 per 1 million output tokens. We welcome your feedback on Grok 4 Fast. The team will incorporate your feedback into ongoing model upgrades, so please leave your feedback on X. If you're looking to push the boundaries of inference efficiency, join us!