deepseek/deepseek-prover-v2-671b

DeepSeek-Prover-V2-671B is a super-large-scale, math- and formal-reasoning-specific large model launched by DeepSeek. Its core mission is to serve as an “AI mathematician,” specifically designed for challenging mathematical proofs, theorem derivation, and symbolic computation tasks.

• Ultra-large dense architecture: With a total of 67.1 billion parameters, it is one of the largest open-source mathematical reasoning models globally, boasting exceptional capabilities in symbolic and logical processing.
• Leading in formal reasoning: It excels in formal proof environments such as Lean and Isabelle, achieving high accuracy in solving problems at the AIME and IMO competition levels.
• Multi-stage training strategy: Combining pre-training, supervised fine-tuning, and reinforcement learning (RL), it progressively enhances its ability to transition from natural language to formal proofs.
• Integration with professional toolchains: It supports seamless collaboration with mathematical engines like Lean 4, Coq, and SymPy, enabling the generation of verifiable, machine-readable proofs.
• Ready for research and education: It has already been adopted by universities and research institutions to assist in mathematical research, automatically grade proof assignments, explore new theorems, and more.

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Core Capabilities

🧠 Deep mathematical reasoning chain: It can construct proofs step by step, just like human mathematicians, employing advanced strategies such as induction, proof by contradiction, and constructive methods.

🧮 Accurate and reliable symbolic computation: It handles problems across multiple domains—including algebra, number theory, combinatorics, and geometry—producing rigorous, hallucination-free derivations.

🔍 Two-way translation between natural language and formal languages: It automatically translates natural language statements like “There are infinitely many prime numbers” into Lean code and can also reverse-translate proof steps back into natural language.

🧩 Intelligent proof assistant: In interactive theorem provers, it provides completion suggestions, strategy recommendations, and error diagnostics, significantly boosting research efficiency.