SpaceX (SPCX) CEO Musk says Grok 4.8 which is a 2.5T model trained with our news C++ software stack will finish training this week and start RL

SpaceX (SPCX) CEO Musk says Grok 4.8 which is a 2.5T model trained with our news C++ software stack will finish training this week and start RL.

Statements of this kind from Musk on model training milestones fit a long-standing pattern: progress updates on his AI ventures arrive informally, without filings, and have historically served more as signalling to investors and rivals than as verifiable technical disclosures. The actors matter here, since commentary of this sort has on past occasions blurred the lines between his separate ventures, and the question reporters have consistently asked is whose economics an AI buildout ultimately serves, given that compute commitments and capital needs sit in different entities. Timelines attached to training runs have tended to slip or shift in scope on previous occasions, so the date framing is best treated as aspirational. The transmission to listed equities runs through the read-across names: AI infrastructure suppliers, the large-cap AI peer set, and any listed vehicle with exposure to his private companies. What bears watching is whether the claim is followed by any formal announcement, benchmark release, or funding detail rather than remaining a standalone social remark.