AI models · xAI
Grok 4.8
Not out. Elon Musk wrote on September 14, 2026 that it's a 2.5T model trained on xAI's new C++ software stack, finishing training that week before reinforcement learning. No date and no price.
What we've written about Grok 4.8
September 14, 2026
The day after agreeing AI should slow down, Musk said Grok 4.8 finishes training this week
Grok 4.7 still isn't out, Grok 5 is his answer for AGI, and neither OpenAI nor Anthropic lists a size to set 2.5T against.
What is Grok 4.8?
Grok 4.8 is a model from xAI, built in the US. The lab has said it's coming. You can't use it yet.
When is Grok 4.8 coming?
No date. xAI hasn't given one, so we haven't made one up.
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