Gideon Mendels

Gideon Mendels is the co-founder and CEO of Comet, the New York machine-learning platform that tracks, compares, and explains the experiments behind AI models. A computer scientist and NLP researcher by training, he built hate-speech detection at Google and ran speech-recognition research at Columbia before turning the messy, undocumented reality of model-building into a company. In 2024 Comet shipped Opik, an open-source LLM evaluation tool, putting Mendels at the center of the scramble to make AI agents reliable in production.