Musk says Grok 4.8 will finish training the week of September 14, 2026
Musk describes Grok 4.8 as a “2.5T model” trained with a new C++ software stack, with reinforcement learning planned next.
TLDR
Elon Musk said on September 14, 2026, that Grok 4.8 would finish training that week and start reinforcement learning. He described it as a “2.5T model” trained with “our new C++ software stack.”
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