SpaceXAI says Grok 4.8 will start reinforcement learning this week
Elon Musk says the 2.5T run beat a 2.1T JAX-trained model despite mistakes corrected midway; a 3T successor is already planned.
By Ryan Merket · Published
Primary source: X - Elon Musk
Why it matters
SpaceXAI is treating training software and data quality as scaling levers alongside model size. Musk's mid-run corrections leave the performance claim unproven until evaluations appear.
Elon Musk (@elonmusk) said in a two-post thread on X on September 14th that Grok 4.8 will finish its current training stage during the week of September 14th and move into reinforcement learning, marking the next step toward a release of SpaceXAI's new frontier model.…
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