Elon Musk: xAI trained Grok using OpenAI models
Under oath, Elon Musk testified that his AI company, xAI, initially trained the large language model Grok using data from OpenAI's models.

What happened?
Elon Musk testified in court on 30 April 2026 that xAI, his AI startup, used OpenAI's AI models to train Grok, xAI's own large language model. This emerged during Musk's testimony regarding a legal dispute between OpenAI and Musk, where OpenAI claims that Musk breached agreements.
Key facts
| Vittnesmålsdatum | 30 april 2026 |
|---|---|
| Företag involverade | xAI, OpenAI |
| Produkt | Grok |
”Distillation is a hot topic as frontier labs try to prevent smaller competitors from copying their models.”
Why it matters
This disclosure is significant as it demonstrates that even major players in the AI industry may rely on others' models during the development phase. It also highlights the debate surrounding "distillation," where a model is trained to imitate or replicate the behaviour of another, more complex model, often to create a smaller and more efficient version. This practice is viewed by some as a way of copying competitors' work.
Who is affected?
The focus is on AI developers and companies such as OpenAI and xAI. It also impacts the broader AI community and regulators scrutinising how AI models are trained and how data is handled. Grok users are indirectly affected as the foundation of the model's training is brought to light.
What else you should know
Musk's testimony marks an important point in the ongoing legal conflict between Musk and OpenAI, a company he co-founded.
Quick answers about this story
Vad har hänt?
När hände det?
Varför spelar det roll?
Vad är 'destillering' inom AI?
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