Forget your standard chatbot updates – DeepSeek AI just quietly dropped something revolutionary onto GitHub: DeepSeek Prover 2. This isn’t just another language model; it’s a specialized AI powerhouse built for hardcore mathematical reasoning, and it’s already crushing benchmarks, leaving many other models in the dust. The best part? It’s open-source and available to try for free.
Let’s break down what this “mathematical beast” is all about.

What Exactly is DeepSeek Prover 2?
Think of DeepSeek Prover 2 as a highly specialized “computer brain” laser-focused on solving complex mathematical problems and, crucially, proving why the answers are correct. Key things to know:
- Maths & Logic Focused: It’s designed explicitly for formal theorem proving, particularly using the Lean 4 framework. This isn’t for writing emails or poems; it’s for rigorous logical deduction.
- Massive Scale: The model boasts a staggering 671 billion parameter architecture (though a 7B version also exists), giving it immense capacity for complex reasoning.
- Problem Decomposition: It uses sophisticated techniques (like reinforcement learning for sub-problem decomposition) to break down enormous, complex mathematical challenges into smaller, manageable steps, solve each piece, and then reassemble the solution.
- Open-Source: DeepSeek continues its trend of releasing powerful models openly, making this advanced technology accessible to researchers and developers worldwide.
Crushing the Competition: Benchmark Performance
The performance numbers are where DeepSeek Prover 2 truly shines:
- It solves nearly 90% of problems on the MiniF2F benchmark test.
- On this benchmark, it scores 88.9%, significantly outperforming models like GPT-4 (75.2%), Claude (71%), and Gemini (68%).
- It shows state-of-the-art results on other challenging benchmarks like Putnam Bench and demonstrates capability on advanced competition-grade problems (Amy 24/25).
Under the Hood: The Tech Powering Prover 2
While the full details require a deep dive, the model leverages:
- A massive 671B parameter count.
- A large 163k token context window.
- A Transformer base combined with specialized architectures (Coldstar RLE mentioned).
- Reinforcement learning focused on breaking down problems (recursive problem decomposition).
- Optimization for efficient inference.
How to Try DeepSeek Prover 2 Right Now
GitHub – deepseek-ai/DeepSeek-Prover-V2