GIGAZINE

Introducing 'Grok 4 Fast,' a high-performance AI that can be used for free on X, with search performance higher than ChatGPT and Gemini and available to free X users

xAI, an AI company led by Elon Musk, announced the low-cost, high-performance AI model Grok 4 Fast on September 19, 2025. Grok 4 Fast is being promoted as a low-cost model with the same performance as ...
GIGAZINE

'Grok 4.1 Fast' is here, supporting 2 million token inputs and reducing hallucinations by half compared to the previous generation model.

Introducing Grok 4.1 Fast and the xAI Agent Tools API. Grok 4.1 Fast is our best tool-calling model to date. With a 2M context window, it shines in real-world use ...