DeepSeek

DeepSeek Overview

DeepSeek is a leading Chinese AI research company focused on developing world-class large language models with exceptional reasoning capabilities. Its flagship DeepSeek-V3.2 and reasoning-specialized DeepSeek-R1 achieve top-tier performance on global AI benchmarks, rivaling OpenAI o1, and are fully released under the MIT open-source license.

Users can access the free web interface at chat.deepseek.com, download the mobile app, or integrate via the Open Platform API. With ultra-low inference costs and state-of-the-art model performance, DeepSeek has become a top choice for developers, researchers, and everyday users worldwide.

Core Features

• Deep Thinking (DeepThink): DeepSeek-R1 uses large-scale reinforcement learning with Chain-of-Thought reasoning, excelling at math competitions, logical reasoning, and scientific Q&A
• Code Generation & Debugging: Supports 50+ programming languages for code completion, bug fixing, algorithm design, and code explanation
• Long Context Processing: Up to 128K context window for handling long documents, codebase analysis, and extended conversations
• Multimodal Understanding: DeepSeek-VL series supports image+text input for analyzing charts, screenshots, and document images
• Web Search: Web version supports real-time internet search for up-to-date information
• File Upload: Supports PDF, Word, code files for analysis and Q&A
• API Integration: Compatible with OpenAI API format, supporting JSON Output, Tool Calls, FIM completion, and more
• Open Source Models: All major model weights open-sourced on GitHub under MIT license, supporting local deployment and commercial use

How to Use

Web Interface

1. Visit chat.deepseek.com
2. Register or log in (phone number or email)
3. Choose mode: standard chat (V3.2) or Deep Think mode (R1 reasoning)
4. Enter your query — supports text, file uploads, and image input

Mobile App

• Download at download.deepseek.com/app for iOS/Android
• Full feature parity with the web version

API Integration

from openai import OpenAI
client = OpenAI(api_key='your_key', base_url='https://api.deepseek.com')
response = client.chat.completions.create(
    model='deepseek-chat',  # or deepseek-reasoner
    messages=[{'role': 'user', 'content': 'Hello'}]
)
print(response.choices[0].message.content)

• Register at platform.deepseek.com to get your API key
• Full documentation: api-docs.deepseek.com

Key Advantages

• Top-Tier Performance: DeepSeek-R1 matches OpenAI o1 on AIME, MATH-500, Codeforces, and other authoritative benchmarks
• Fully Open Source: Model weights released under MIT license — freely distill, fine-tune, and commercialize
• Ultra-Low Pricing: API costs are 1/10th or less of comparable products; deepseek-chat input at just $0.028/M tokens (cache hit)
• Chinese Language Optimized: Among the strongest open-source models for Chinese language understanding and generation
• Free to Use: Web and app versions are completely free with no usage caps
• Transparent Reasoning: Deep Think mode shows the full reasoning chain for verification and learning
• Rich Ecosystem: Active open-source community with extensive third-party tools, plugins, and deployment solutions

Pricing

Free Tier

• Web Interface: chat.deepseek.com — completely free, no usage limits
• Mobile App: Free to download and use

API Pricing (per 1M tokens)

Model	Input (Cache Hit)	Input (Cache Miss)	Output
deepseek-chat (V3.2)	$0.028	$0.28	$0.42
deepseek-reasoner (R1)	$0.14	$0.55	$2.19

• Context length: 128K tokens
• Pay-as-you-go with balance top-up
• Full pricing details: api-docs.deepseek.com/quick_start/pricing

Support & Resources

• Official Docs: api-docs.deepseek.com — API reference, guides, best practices
• GitHub: github.com/deepseek-ai — open-source models, technical reports, sample code
• Service Status: status.deepseek.com — real-time API availability
• Email Support: service@deepseek.com
• Security Reports: security@deepseek.com
• Social Media: Twitter @deepseek_ai, Zhihu, Xiaohongshu
• WeChat Official Account: DeepSeek official account for latest model updates

Download & Access

• Web: Access directly at chat.deepseek.com — no installation needed
• Mobile App: download.deepseek.com/app for iOS and Android
• Open Platform: platform.deepseek.com — register for API access
• Open Source Model Downloads:
  • DeepSeek-R1 — reasoning model, MIT license
  • DeepSeek-V3 — flagship chat model
  • DeepSeek-Coder-V2 — code-specialized model
  • DeepSeek-VL — multimodal vision-language model

Additional Information

• Company: Hangzhou DeepSeek Artificial Intelligence, founded 2023, headquartered in Hangzhou, China
• Latest Release: DeepSeek-V3.2 (February 2026) — enhanced Agent capabilities with integrated reasoning
• Model Lineage: DeepSeek-LLM → V2 → V3 → V3.2; DeepSeek-Coder → Coder V2; DeepSeek-R1; DeepSeek-VL
• License: MIT License — commercial use, distillation, and fine-tuning all permitted
• Careers: Job openings — hiring AI researchers and engineers
• Privacy Policy: View policy
• Terms of Use: View terms