Elon Musk's xAI has released the Grok 4 Fast in early beta for users on the Grok web version. The new Grok 4 Fast model offers quicker responses in seconds as compared to the Grok 4 version. As per a report by TestingCatalog, the new 'Fast' model is 10x faster and is available via model selector as early access. Besides, the Grok web version also got a dedicated Changelog section. Seedream 4.0: China’s ByteDance Unveils New AI Image Generation Tool To Rival Google’s Gemini Nano Banana; Know Features, Differences and Availability.
Grok 4 Fast Beta Version Launched for Premium Users on Web Version
BREAKING 🚨: xAI released "Grok 4 Fast" in Early beta on the Grok web.
Here is a comparison of Grok 4 vs. Grok 4 Fast in terms of speed.
Fastest AI on the Earth? 👀 pic.twitter.com/xDJNGY8q71
— TestingCatalog News 🗞 (@testingcatalog) September 14, 2025
Grok 4 Web Version Now Has Changelog Section
Grok on the web now also has a new dedicated Changelog section!
ICYMI, September 5 updates:
- Calculator, unit conversion tools
- Improved code highlighting
- Tool calling for fast mode
- Generate Imagine videos from chat-generated images
- Imagine audio mute preference… https://t.co/BJZZLs7Wk5 pic.twitter.com/OkoxvNRhy8
— TestingCatalog News 🗞 (@testingcatalog) September 14, 2025
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