xAI Announces Free Access to Grok 4 Fast, a 2 Million-Token Multimodal AI Model

Details

• xAI has launched Grok 4 Fast, a multimodal language model engineered for rapid reasoning with support for text, code, and image inputs.
• The model’s 2 million-token context window is large enough to process the entire English Wikipedia in one go.
• Grok 4 Fast is available now on the Grok web app, xAI’s official chat portal, iOS and Android apps, as well as platforms like OpenRouter and Vercel AI Gateway.
• Users can access Grok 4 Fast for free on OpenRouter and Vercel, while xAI’s direct API prices start at $0.20 per million input tokens and $0.50 per million output tokens.
• The model is setting new industry benchmarks, breaking Pareto Intelligence records and ranking first in the Search Arena and eighth in the Text Arena by LM Arena.
• All account levels, including free users, are able to use the model in “Fast” and “Auto” modes with no restrictions on usage.
• xAI is actively seeking user feedback via X and pledges continual upgrades based on user input and emerging data.

Impact

xAI’s decision to offer Grok 4 Fast for free positions it ahead of rivals like OpenAI, Anthropic, and Google that keep their latest models behind paid tiers. The model’s expansive context window surpasses Anthropic’s Claude 4.1, fueling competition in long-context reasoning and AI memory. Aggressive pricing and broad multimodal capabilities set new industry standards, reshaping market expectations for both enterprise and independent developers.