DeepSeek R2

Overview

DeepSeek R2 is an open-source reasoning model that rivals frontier closed models on math, code, and logical reasoning tasks. A strong choice for applications that need step-by-step problem solving.

Key Strengths

• Reasoning: Exceptional chain-of-thought and mathematical reasoning
• Code: Strong code generation and debugging, especially Python
• Open source: Fully open weights, run locally or via API
• Cost: Very competitive pricing via API, or free locally
• Math: Near-GPT-5 performance on mathematical benchmarks

Prompting Tips

Activate Reasoning

DeepSeek R2 has a built-in reasoning mode:

Think carefully about this problem. Show your reasoning step by step.
[problem]

Code Tasks

DeepSeek excels at code when given clear specifications:

Write a Python function that:
- Input: list of transactions [{amount, date, category}]
- Output: monthly spending report grouped by category
- Include type hints, error handling, and docstring
- Write 3 pytest test cases

Math and Logic

Prove that for any prime p > 3, p^2 - 1 is divisible by 24.
Show each step of your proof clearly.

Best Use Cases

Use Case	Quality
Mathematical reasoning	Excellent
Code generation (Python)	Excellent
Logic puzzles	Excellent
Scientific analysis	Very Good
General chat	Good
Creative writing	Fair

Access

• Open weights: Hugging Face (run locally)
• API: DeepSeek platform, Together AI, Fireworks
• Local: Requires 40GB+ VRAM for full model, quantized versions for consumer GPUs