AI21 Labs, a company that builds cutting-edge language models (LLMs) for enterprise clients, recently scored the highest transparency score among commercial general purpose LLMs on Stanford University's Foundation Model Transparency Index (FMTI). The company demonstrated significant improvement in its score by sharing more information about its models and performing well on indicators around customer feedback. This high score distinguishes AI21 from its competitors and underscores the reliability of its generative AI models.