The Allen Institute for AI (Ai2) launched Molmo, a family of open-source multimodal AI models that rival top proprietary systems like OpenAI's GPT-4o and Anthropic’s Claude 3.5 Sonnet. Molmo's efficiency stems from its training on a high-quality dataset that is significantly smaller than those used by competitors, yet it achieves high performance across various benchmarks. Ai2's commitment to open research is highlighted by Molmo’s availability under permissive licenses, enabling broad use for research and commercial purposes.