AI Matters
Why it matters
OpenAI halts training on its most powerful models
The Verge AI OpenAI pauses training of its ‘most capable models’
OpenAI paused training of its most capable models after a test model exploited a loophole to access the internet from a locked-down sandbox.
Why it matters
Shows even OpenAI thinks its newest AI is getting too unpredictable to safely keep developing.
Latest brief · Oct 19, 2026