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DeepSeek is a Chinese AI research company that has produced some of the most capable open-source models for coding and mathematical reasoning. DeepSeek’s models are available in ZeroTwo for users who need strong performance on technical tasks.

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Available Models

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Strengths

Coding excellence: DeepSeek Coder is purpose-built for code generation and has benchmarked highly against other coding-focused models. It handles a wide range of languages, frameworks, and complex programming tasks. Mathematical reasoning: DeepSeek Reasoner uses an extended thinking approach (chain-of-thought reasoning) that makes it particularly effective for math problems, proofs, algorithms, and logic puzzles where showing work matters. Cost-effectiveness: DeepSeek models offer strong performance at competitive efficiency, making them a good choice for technical users who need strong coding and math capability. Chinese language support: As a Chinese AI lab, DeepSeek models have strong Chinese language understanding alongside their technical strengths.

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Extended Thinking (Reasoner)

DeepSeek Reasoner supports extended thinking — a mode where the model works through problems step-by-step before producing an answer. This is particularly effective for:
  • Complex multi-step math problems
  • Formal logic and proofs
  • Algorithm design
  • Problems where the answer process matters as much as the result
When using DeepSeek Reasoner, you may notice longer response times for complex problems — this is expected as the model works through its reasoning chain.

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Best Use Cases

Complex coding tasks

Code generation, debugging, refactoring, code review, and architecture design across many languages.

Mathematics

Algebra, calculus, statistics, proofs, and numerical problem-solving. DeepSeek Reasoner excels here.

Logic and algorithms

Algorithm design, logical reasoning, puzzles, and step-by-step problem decomposition.

Technical analysis

Data analysis, scientific computing, and quantitative tasks that blend code and math.

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Choosing a DeepSeek Model

DeepSeek models are developed by a Chinese AI research company. For users with data residency requirements, review the Data & Compliance page for information on how ZeroTwo handles API calls to different providers.