Wikipedia

Wikipedia is the world's largest free encyclopedia, containing over 60 million articles in more than 300 languages, collaboratively written and maintained by a global community of volunteer editors. Wikipedia represents one of humanity's most ambitious knowledge projects and a crucial data source for AI systems.

Wikipedia content has been foundational training data for virtually every major language model. Its structured format, broad coverage, and relatively high quality make it an ideal source for teaching models about entities, relationships, facts, and the structure of human knowledge. Wikipedia's category system and interlinked structure also help models learn knowledge organization and reasoning.

In the knowledge and substrate layer, Wikipedia serves as a foundational knowledge asset — a free, open, multilingual repository of human knowledge that has shaped the factual capabilities of the AI models powering the agentic economy.