Elon Musk personally steps in to debunk the rumors, saying 1T parameters have become 0.5T—this storyline is even more exciting than the crypto world.

ME News message: On April 18 (UTC+8), according to Beating Monitoring by Dongcha, Grok 4.3 (beta) has been opened to users who subscribed to the highest tier SuperGrok Heavy. On the 17th, users saw this version in the dropdown menu on Grok.com marked with “Early Access.” In the morning of the 18th, X user Mark Kretschmann posted that this version has 1T parameters, with a size twice that of Grok 4.20, and with significantly longer training time as well. xAI and Tesla CEO Elon Musk later corrected this in the same tweet, stating that the current 4.3 (beta) is still a 0.5T model, merely an updated training checkpoint, not the 1T new model speculated by the outside world.