Launched in October 2023, the Mercari AI Assistant helps users optimize their listings. If an item remains unsold for a certain period, the AI evaluates the listing against best practices and provides tailored suggestions.

This feature initially relied on a hybrid model approach using the OpenAI models:

The result? Mercari observed a statistically significant increase in average sales per user, demonstrating the feature’s effectiveness in improving listing quality.

“Today, these features are seamlessly integrated into the listing experience, allowing users to benefit from AI without even being aware of it,” says Yasuo Hishii, Supply Team Director at Mercari. This approach ensures the technology works behind the scenes, enhancing the process without adding complexity.