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DeepSeek-R1

Specialized reasoning model; 671B parameters (37B active); chain-of-thought; competitive with advanced reasoning models

Deepseek
Launched in January 2025, DeepSeek-R1 introduced specialized reasoning capabilities using reinforcement learning (GRPO) to optimize step-by-step problem-solving. Built on the DeepSeek-V3 foundation with 671 billion total parameters and 37 billion active, R1 achieved performance comparable to advanced reasoning models from competitors while using significantly fewer computational resources. It excels at mathematics, formal logic, multi-step planning, and complex inference tasks through explicit chain-of-thought reasoning. DeepSeek-R1 quickly became one of the most popular open-source models, legitimizing DeepSeek as a credible alternative to proprietary models from OpenAI, Anthropic, and Google for reasoning-intensive applications.

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