Musk Says Grok 4.8 Limited Release Coming Within Days After Engine Rebuild

At a glance

Elon Musk said a limited release of the next Grok chatbot, version 4.8, will come later this week. He said the company rebuilt the underlying technology from scratch, dropping outside tools.

Key points

1. 1

   Musk said xAI dropped Google's JAX and the open-source SGLang engine and rewrote the stack in C/C++.

2. 2

   Pretraining is finished and the model is now in reinforcement learning, where its evaluation scores have begun to rise.

3. 3

   Musk said 4.8 is not impressive yet but should differ from 4.7 because the foundations were rebuilt.

4. 4

   Grok 4.7 launched on September 21, and the exact audience and full release date for 4.8 have not been disclosed.

Why it matters

Rebuilding the core technology of an AI model trades development time for more speed and control, which shows the direction Grok is taking.

Also reported by

• Martin Cid Magazine일론 머스크 “Grok 4.8 지연은 C/C++로 소프트웨어를 처음부터 다시 짠 탓”