Models.dev – An open-source database of AI models

Models.dev is an open-source database cataloging hundreds of AI models from providers like OpenAI, Anthropic, and Google, displaying specifications including pricing, context windows, and availability dates. The database tracks models ranging from GPT-5 variants priced at $1.25-$120 per million tokens to free options like GLM-4.5-Flash, covering both open-source and closed-source systems. Each entry includes technical details such as input/output token limits, reasoning capabilities, and release timelines, with some models extending context windows up to 2 million tokens. This centralized resource helps developers and researchers compare AI model options and pricing across the rapidly expanding landscape of language models.