After a multi-hour outage that took place in the early hours of the morning, OpenAI’s ChatGPT chatbot went down again — but this time, it wasn’t the only AI provider affected. On Tuesday morning, both Anthropic’s Claude and Perplexity began seeing issues, too, but these were more quickly resolved.

Google’s Gemini appears to be operating at present, though it may have also briefly gone offline, according to some user reports.

It’s unusual for three major AI providers to all be down at the same time, which could signal a broader infrastructure issue or internet-scale problem, such as those that affect multiple social media sites simultaneously, for example. It’s also possible that Claude and Perplexity’s issues were not due to bugs or other issues, but from receiving too much traffic in a short period of time due to ChatGPT’s outage.