Elon Musk said on Nov. 10 that Grok 4.8 has finished pretraining and is now in reinforcement learning after xAI dumped JAX and SGLang and rewrote its training and inference stack in C and C++, Tesla North reported. He said a limited rollout to Grok Bot users is coming later this week. Asked how 4.8 would compare with Anthropic’s Claude Opus 5.5, Musk said it would be “not as good” and called Opus 5.5 a “masterpiece,” Decrypt and Tesla North reported, adding that he expects Grok 5 to exceed Opus 5.5 in two or three months. He did not give a date for a wider public release.
The front page / AI / AI
AI / AIMusk Says Grok 4.8 Finished Pretraining and Will Soft-Launch This Week
Musk also said Grok 4.8 would not be as good as Anthropic’s Claude Opus 5.5, which he called a “masterpiece,” and that Grok 5 should exceed it in two or three months.
Go to the original sources
This article is an original summary written from the sources below. We encourage readers to visit them for full coverage. Spot an error? Tell us.
Get Tesla News Wire in your inbox
The Tesla news that matters to owners and investors, from software versions to delivery numbers, in one short email. Free, and you can unsubscribe anytime.
We use your email only to send the Tesla News Wire newsletter. Details in our privacy policy.