Elon Musk said Grok 4.8 is a 2.5-trillion-parameter model trained on xAI's new C++ software stack. Training wraps this week, then reinforcement learning begins. In a follow-up he said Grok 4.7 should be roughly on par with Opus 5.0, Grok 4.8 a noticeable improvement, Grok 4.9 likely Astra/Fable class, and Grok 5 possibly better than anything.

Key Takeaways

  • ✓Elon Musk said Grok 4.8 is a 2.5-trillion-parameter model trained on xAI's new C++ software stack. Training wraps this week, then reinforcement learning begins. In a follow-up he said Grok 4.7 should be roughly on par with Opus 5.0, Grok 4.8 a noticeable improvement, Grok 4.9 likely Astra/Fable class, and Grok 5 possibly better than anything.
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