Which user-agent strings identify ChatGPT-User?

The following user-agent strings identify ChatGPT-User: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot.

Does ChatGPT-User respect robots.txt rules?

According to official documentation, ChatGPT-User does not respect robots.txt rules.

How do I block or allow ChatGPT-User in robots.txt?

You can control ChatGPT-User access using robots.txt rules. See the blocking snippet on this page for specific directives.

How can I verify ChatGPT-User traffic in server logs?

You can verify ChatGPT-User requests by checking your server access logs for the documented user-agent strings. For accurate verification, correlate user-agent patterns with IP ranges or verification methods provided by OpenAI.

What is ChatGPT-User?

Direct Answer: ChatGPT-User is for user actions in ChatGPT and Custom GPTs. When users ask ChatGPT or a CustomGPT a question, it may visit a web page to help answer and include a link to the source in its response.

Operator: OpenAI Purpose: AI Training AI Training

User-Agent Identification

The following user-agent strings identify ChatGPT-User in your server logs:

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot

robots.txt Rules for ChatGPT-User

Respects robots.txt: No

Use the following robots.txt rules to control ChatGPT-User access:

# Block ChatGPT-User
User-agent: ChatGPT-User
Disallow: /

# Allow ChatGPT-User
User-agent: ChatGPT-User
Allow: /

Crawl Behavior

Request Pattern: Not Documented

Log Verification

To verify ChatGPT-User traffic in your server logs:

Search access logs for the user-agent strings listed above
Check if the IP addresses match documented ranges (if provided by OpenAI)
Verify the crawl pattern matches documented behavior
Use reverse DNS lookup for additional verification if available

Note: Observed behavior in production environments may differ from official documentation. Log-based monitoring provides the only reliable verification of actual bot behavior.

Missing Information

The following information is not officially documented for ChatGPT-User:

Request behavior
Crawl frequency
IP ranges

Official Documentation

View Official ChatGPT-User Documentation →

Information extracted on February 2, 2026 from official sources.