# OpenAI pauses training of its ‘most capable models’ > Source: > Published: 2026-09-26 16:34:59+00:00 # OpenAI pauses training of its ‘most capable models’ [The Verge AI](https://www.theverge.com) As reports of [OpenAI](https://www.machinebrief.com/glossary/openai)'s models [breaking containment](https://www.theverge.com/column/980337/rogue-ai-science-fiction-openai), hacking sites, and generally getting out of control pile up, the company has made the decision to [pause training](https://alignment.openai.com/misalignment-reports/an-agent-used-dns-to-reach-an-external-chatbot/) of its most powerful models. The decision was made after a model being tested within a sandbox exploited a loophole to [gain internet access](https://www.theverge.com/ai-artificial-intelligence/999881/why-cant-we-airgap-rogue-ai-agents). The incident happened on September 20th, and "All [training](https://www.machinebrief.com/glossary/training), [evaluation](https://www.machinebrief.com/glossary/evaluation), and [inference](https://www.machinebrief.com/glossary/inference) with tool-use" remains paused as of Saturday evening, September 25th. In addition, OpenAI revealed on Friday that its agents had inappropriately uploaded 53nimages from [ChatGPT](https://www.machinebrief.com/compare/chatgpt-vs-claude) users to image-hosting sites. The company has not stated if the images were AI- … Get AI news in your inbox Daily digest of what matters in AI. ## Key Terms Explained [Evaluation](https://www.machinebrief.com/glossary/evaluation) The process of measuring how well an AI model performs on its intended task. [Inference](https://www.machinebrief.com/glossary/inference) Running a trained model to make predictions on new data. [OpenAI](https://www.machinebrief.com/glossary/openai) The AI company behind ChatGPT, GPT-4, DALL-E, and Whisper. [Training](https://www.machinebrief.com/glossary/training) The process of teaching an AI model by exposing it to data and adjusting its parameters to minimize errors.