# OpenAI Accuses Elon Musk of 'Legal Ambush' in $100 Billion Lawsuit

_Saturday, April 11, 2026 at 4:09 AM EDT · Policy, AI · Latest · Tier 2 — Notable_

OpenAI has accused Elon Musk of a "legal ambush" in response to recent amendments the billionaire made to his lawsuit against the artificial intelligence company. In a court filing, OpenAI characterized the changes as "legally improper and factually unsupported."

The dispute stems from Musk's ongoing litigation against OpenAI, which he co-founded but later left. Musk has alleged that the company abandoned its original nonprofit mission in favor of profit-oriented operations through its partnership with Microsoft. The lawsuit seeks significant damages and aims to prevent OpenAI from converting to a for-profit entity.

OpenAI's filing comes as the parties prepare for a trial expected to involve claims worth at least $100 billion. The company argues that Musk's recent amendments represent an improper attempt to alter the scope of the case at a late stage in proceedings.

The legal battle highlights broader tensions in the AI industry over governance structures and the balance between nonprofit research missions and commercial viability. Musk has been vocal in his criticism of OpenAI's direction, while the company maintains it has remained committed to developing artificial general intelligence that benefits humanity.

The case is being closely watched by industry observers as it could set precedents for how AI companies structure their ownership and operations.

## Sources

- [Bloomberg](https://www.bloomberg.com/news/articles/2026-04-11/openai-accuses-musk-of-ambush-as-100-billion-plus-trial-looms)

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