ChatGPT was down Tuesday for some users on Tuesday, with more than 1,500 outage reports on Downdetector, a site that logs user reports of internet issues.

The artificial intelligence chatbot gave some users a “Too many concurrent requests” message, or would not answer questions.

CNBC has reached out to OpenAI for more information on ChatGPT’s functionality.

OpenAI announced Monday that it reached $10 billion in annual recurring revenue (ARR). Last year, the company had around $5.5 billion in ARR but reported a loss of about $5 billion.

ChatGPT rolled out an update to Advanced Voice for paid users on Saturday. The feature improves “intonation and naturalness, making interactions feel more fluid and human-like,” according to the release notes.

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