Elon Musk’s xAI is preparing to unleash a pair of massive AI models in rapid succession this summer, with a 1.5 trillion parameter Grok 4.5 already in private beta and a 2 trillion parameter follow-up targeting an August launch.
Musk announced on June 28 that Grok 4.5, built on what xAI calls its V9 foundation model, has finished training and is currently being tested internally at SpaceX and Tesla. No public API access or external benchmarks have been made available yet.
The numbers behind the next Grok generation
Here’s the thing about 1.5 trillion parameters: it represents roughly a threefold increase over the existing Grok 4.x production series, which runs on approximately 500 billion parameters.
The 2 trillion parameter model is reportedly in the final stages of training and expected to complete by late July. A public launch is anticipated for August, though xAI hasn’t committed to specific dates for broader access to either model.
