DeepSeek

DeepSeek

Free

China's open-source AI chatbot offering free access to powerful reasoning and coding models.

AI Chatbots
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What is DeepSeek?

DeepSeek is a Chinese AI company offering free, open-source large language models that rival leading proprietary models at a fraction of the cost. Its web app at deepseek.com provides completely free access to DeepSeek V3 and R1 reasoning models with no subscription required. DeepSeek V3 excels at general-purpose chat and coding, while the R1 model uses chain-of-thought reasoning for complex math, logic, and programming tasks. For developers, the API is pay-as-you-go with some of the lowest token prices in the industry. The open-source nature allows self-hosting for organizations with data privacy requirements, though international data security concerns have been raised.

Key Features

Chain-of-Thought ReasoningOpen-Source ModelsFree Web Access128K Context WindowCode GenerationMath Problem SolvingUltra-Low API Pricing

How to Use DeepSeek

1Visit deepseek.com and sign in for free
2Choose between standard chat (V3) or thinking mode (R1)
3Type your question, coding task, or math problem
4Review the step-by-step reasoning output
5Copy or export the response for your use
6Access the API at platform.deepseek.com for developer integration

✅ Best For

  • Developers and researchers on a budget
  • Students solving math and logic problems
  • Coders needing fast code generation
  • Organizations exploring open-source AI

❌ Not For

  • Users with strict data privacy requirements (China-based servers)
  • Real-time internet browsing tasks
  • Image generation
  • Tasks needing Google or Microsoft ecosystem integration

Reviews

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Pricing

Free$0
  • ✓Unlimited web chat
  • ✓DeepSeek V3 and R1 access
API $0.028/1M tokens
  • ✓Cache-hit input pricing
  • ✓extremely cost-effective for developers

Prompts to Try

Solve this calculus problem step by step and show your working

Write a Python function to implement a binary search tree with insert, delete, and search

Explain the differences between REST and GraphQL APIs with code examples

Debug this Rust code and explain what each error means

Use Cases

A computer science student struggling with a dynamic programming problem pastes it into DeepSeek R1 and gets a step-by-step solution with a clear explanation of the logic
A solo developer building a side project uses DeepSeek's API to power their app's AI features because the token cost is 95 percent cheaper than GPT-4 at their usage volume
A data science intern asks DeepSeek to explain a complex statistics concept from their coursework and gets a breakdown with worked examples that their textbook never provided
A startup CTO evaluates DeepSeek for their internal tools because the open-source model can be self-hosted on their own servers, keeping sensitive customer data off third-party clouds
A high school math teacher uses DeepSeek to generate a set of calculus problems at three different difficulty levels, saving two hours of exam prep every week

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Frequently Asked Questions