Many AI content detectors are available, and the "best" one depends on your specific needs and use case. Some factors to consider when evaluating an AI content detector include accuracy, ease of use, scalability, and cost. A popular AI content detector is OpenAI's GPT-3 language model, one of the largest and most powerful language models currently available. GPT-3 can be used to create human-like text and analyze text to identify key themes, topics, and emotions.