Microsoft released on March 4 a compact 15B multimodal model that processes images and text with chain-of-thought reasoning. Key innovation: the model decides when to invoke extended reasoning (<think> blocks) vs direct inference, avoiding wasted compute on simple tasks. Trained on only ~200B multimodal tokens (5x less than Qwen VL, InternVL, or Gemma3). Trained on 240 B200 GPUs in 4 days. Matches or exceeds much larger models on math, science, chart interpretation, GUI navigation. Available on