# OpenAI breached by researchers using Anthropic models

> **Open Intelligence Dossier** · First detected: 2026-09-18 06:00 UTC · Category: Business

## Executive Summary
2 news sources are covering this Business story right now — PULSE is tracking how fast it spreads.

## Intelligence Brief
"OpenAI breached by researchers using Anthropic models" is generating significant coverage in the Business category, with 2 articles from 2 distinct sources tracked by PULSE so far.


Outlets currently covering the story include cybersecuritynews.com and Forbes. PULSE measures a story's velocity from how quickly new articles appear and how many independent newsrooms join the coverage.


This brief was generated by PULSE's extractive engine from coverage metadata only. The latest headlines from every source are listed below; the velocity chart shows how the story is developing in real time.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| TechCrunch | Researchers used Anthropic’s Claude to hack into OpenAI | [Source Link](https://news.google.com/rss/articles/CBMikwFBVV95cUxQS0tYS0VHd1I0cEFmd0JuMHh0SEg0NGxoMUprUDFPWVRlWWZvWE9LN0ZWMWd6Z2Utc2dlYWY2elB3Nk1xTGtRZm5aSzFDZlhfR0JRSms0NkJmVDlDY3JJYkxzU0M4ZWFLak1RSnNGNTlzWTJRZmxkbGZfUWppNUVDc3hxQUlVd01Ha1Z1U1ZYUzJReUU?oc=5) |
| arstechnica.com | Researchers used Claude to hack OpenAI | [Source Link](https://news.google.com/rss/articles/CBMif0FVX3lxTE1tUFQ2c01oRUhKa0MyVGlERU9Sa2toSEhmcFMyOUg4Z1hRU1NwMUFZRk5DeGxNTll2SGZXT0lUUkRUM3pKOG9FSW16MG1xM1dRa0JsVnZuc2swVjBzOE5YNWxpNmhIZkREdm4ycHd0ZDQ2d25uRzVJLWhjdEc2MmM?oc=5) |
| Fortune | Three guys using Anthropic’s Claude hacked into OpenAI and accessed its source code for $6,500 reward | [Source Link](https://news.google.com/rss/articles/CBMikAFBVV95cUxQVW80YlEwQkJ0MlpGREhiRy12UGVkdUpULW1GUm1WenpEM2NQbGk0Z2lETGNNVlZtQVJFN3lna2Mzb0xKSWoxVzN5T19lZmwycnRJNmVlc3RRVmZLdU9Md3pDd1BVUDFiLXVXR0ZFVWhCaW9OOFM1bWxoNXFwNWlSelFVYjhCcU5kS181RUQ2VjM?oc=5) |
| The Guardian | OpenAI ‘ethically hacked’ with help of Anthropic’s Claude chatbot | [Source Link](https://news.google.com/rss/articles/CBMikwFBVV95cUxORGtkcDVTUGdMQW5OWHpxVmFVLXlyel9IRVJhNVVmTWF6NFk2enhmOFNVdnJyY3RkMzRhbWpXaXBjVWk4YzJxekdLSzM4SHJWRW56QzFWZDlncUtPdUlZb1Zva1VtdWF0anZSejVWanJnWlNhb0xXSUU3R0VRRmlneWVqMmRoUWdwMGNSd3p3TUJObUU?oc=5) |
| Business Insider | This tiny cybersecurity startup managed to hack OpenAI using Claude, and won a $6,500 bounty | [Source Link](https://news.google.com/rss/articles/CBMingFBVV95cUxNYkM2SE43a1NGNEJLeWw2dnBMbVlwc2ZBeDloemlzeUFZc3dhYXlCTWhJZDlSTDhlMFl5ckk4aTljVk9JOU93UGI5UEpVVnpQRTdxYS1Ga2k2OTJSUzhBUlRTRlJpdnpHRTJxQXVUTXZWM3ZaT0I5Ylp2SXd3bTNweVZlUUNRNXBlTE56czdDSEM0QjhKMy1vTGVRc18tdw?oc=5) |
| cybersecuritynews.com | Researchers Use Claude Opus 5 to Hack OpenAI Forum and Reach Internal Repositories | [Source Link](https://news.google.com/rss/articles/CBMidEFVX3lxTFB6TFhfVGhNektfV05vR0luZ25sYTBxVjBQMzNiblNTT2E2LWFucElkam1TRERuTm1LT0Q2WEJkbS1DVnVpZDI0blViaDZRUHRLdXFTUlFpSXVBQnBEMTM2bVhfeFZGSjhQZWdxYzlMQlZxSGRG0gF6QVVfeXFMTUQ1RUM0eklRVjhlNS1jMEV2RFEwWDRZRDRrWThSTWNXSG9mTVVYOVRmSkcyY1lSUUg3Vm5fQngtZmlERHREWVk4d1Y4Zmk0N3FQb1N4elpTUlBGbm9HRGw0WE9oS1VkdVVTVWJYcFRPVVE3MDV1R0lJT3c?oc=5) |
| Forbes | Security Researchers Hacked Into OpenAI Using Anthropic’s Claude | [Source Link](https://news.google.com/rss/articles/CBMiuAFBVV95cUxQcW5TQ3c4elF6NEloRlVEN3JqZnVOOVFmWW5HdXRvR0pybGRXUzFFanItb0pLdzVDZlpBUkJqX2xMejdKV19ERHM5N2kzOGdZck1Eem9yNVBSWVRSMkNqRFZkckRQb2FCREYtV25iZnNRRjNralRubkM0MXRRekhxZ3lIRm1WallPNFJBOE5oMENhdUk2UVZ2Y0xydVBpVGhuTnlzZFZYeUZnMzg0NGJBQ1dkWGRTOVJy?oc=5) |

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*Canonical Source: https://pulse.byoaiapps.com/trend/2026-09-18/openai-breached-by-researchers-using-anthropic-models*