xAI Updates: May 1, 2026

1. xAI Outlines Grok 5 Roadmap Targeting 10 Trillion Parameters

Elon Musk shared an updated xAI roadmap positioning Grok 5 as the company’s push toward Artificial General Intelligence, with planned variants at 6 trillion and 10 trillion parameters built on a Mixture-of-Experts architecture. The interim Grok 4.3 beta is operational, with Grok 4.4 and 4.5 expected to land at roughly 1 trillion and 1.5 trillion parameters before the Grok 5 jump. xAI’s official channels have pointed to a Q2 2026 window for a Grok 5 public beta. Source

2. xAI Closes Upsized Series E at $20 Billion

xAI completed an upsized Series E funding round, raising $20 billion versus an originally targeted $15 billion. The capital is earmarked for compute scale-up, including continued expansion of the Colossus supercomputer footprint, and to fund the multi-trillion parameter training runs planned for the Grok 4.4, 4.5, and 5 generations. Source

3. Musk Testifies That xAI Trained Grok on OpenAI Model Outputs

In court testimony on April 30, Elon Musk acknowledged that xAI used outputs from OpenAI models during Grok’s training pipeline, a disclosure that surfaced as part of ongoing litigation between Musk and OpenAI. The admission has drawn industry attention to questions about distillation, terms of service for frontier model APIs, and how xAI’s data sourcing may factor into competitive and legal dynamics around Grok’s continued development. Source