DeepSeek R1

DeepSeek R1 was released January 20, 2025 as an open-weight reasoning model that rivaled OpenAI's o1. Built on DeepSeek V3 with reinforcement learning for chain-of-thought reasoning. Scored 97.3% on MATH, 71.5% on GPQA Diamond, and 49.2% on SWE-bench Verified. Also released smaller distilled versions (1.5B to 70B). Released under MIT license, making it the first open-weight model competitive with proprietary reasoning models.