Transparency is important to us, so we want to inform you about a recent security incident at Mixpanel, a data analytics provider OpenAI used for web analytics on the frontend interface for our API product (platform.openai.com⁠(opens in a new window)).

The incident occurred within Mixpanel’s systems and involved limited analytics data related to some users of the API. It also affected a limited number of ChatGPT users who submitted help center tickets or were logged into platform.openai.com.

This was not a breach of OpenAI’s systems. No chat, API requests, API usage data, passwords, credentials, API keys, payment details, or government IDs were compromised or exposed.

On November 9, 2025, Mixpanel became aware of an attacker that gained unauthorized access to part of their systems and exported a dataset containing limited customer identifiable information and analytics information. Mixpanel notified OpenAI that they were investigating, and on November 25, 2025, they shared the affected dataset with us.

User profile information associated with the use of platform.openai.com⁠(opens in a new window) may have been included in data exported from Mixpanel. The information that may have been affected was limited to: