DeepSeek
Level 1: General Assistants & Reasoning LLMs
Assistance & Knowledge Work · Level 1
In short
DeepSeek is an AI tool in the General AI category from Hangzhou DeepSeek Artificial Intelligence Co., Ltd. in Hangzhou, China. The pricing model is freemium. It is with an English interface that handles German content.
What is DeepSeek?
DeepSeek is a groundbreaking AI platform and model series developed by the Chinese research organization Hangzhou DeepSeek Artificial Intelligence Co., Ltd. The company creates high-performance open-source language models such as DeepSeek-V3 and the reasoning-specialized DeepSeek-R1. Leveraging innovative architectures like Mixture-of-Experts (MoE) and Multi-Head Latent Attention, DeepSeek achieves benchmark performance competing with leading proprietary models at a fraction of the inference cost.
The technology relies on advanced reinforcement learning and highly optimized token handling. Specifically, the reasoning model DeepSeek-R1 employs explicit Chain-of-Thought logic to systematically break down complex mathematical, logical, and coding challenges. Users can interact with the models for free via the web chat, integrate them into applications using an affordable REST API, or download the open-source weights for local deployment on private infrastructure.
DeepSeek is primarily used for software engineering, advanced mathematical reasoning, data analysis, and technical content generation. Due to its open-weights nature, developers and researchers globally utilize DeepSeek as a foundation for fine-tuning and building custom AI solutions. Its combination of ultra-low API costs and top-tier capabilities makes it a major alternative in the global AI ecosystem.
Core features & strengths
- DeepSeek-R1 Reasoning Capabilities — The model features explicit step-by-step reasoning processes designed to solve intricate logical, mathematical, and programming challenges. Users can inspect the generated thought process for full transparency.
- Ultra-Low Cost API — Thanks to structural architectural optimizations, DeepSeek offers API pricing significantly cheaper than established cloud competitors. Built-in prompt caching further reduces costs for repeated context queries.
- Open-Weights and Local Hosting — Model weights for DeepSeek-V3 and R1 are published under open licenses. This enables enterprises and developers to run models entirely on self-hosted local or cloud servers for maximum control.
Who is this tool for?
Software engineers, data scientists, AI researchers, and companies looking for highly cost-effective frontier models or customizable open-source AI solutions.
Typical use case
A software engineer uses DeepSeek-R1 to refactor a complex system architecture and identify obscure memory leaks. By feeding the code snippets and stack traces into the tool, the model steps through the underlying execution logic, explains the structural flaws in detail, and produces optimized, clean code along with unit tests to prevent future regression.
What is DeepSeek good for?
- Software engineers, data scientists, AI researchers, and companies looking for highly cost-effective frontier models or customizable open-source AI solutions.
- A software engineer uses DeepSeek-R1 to refactor a complex system architecture and identify obscure memory leaks.
- DeepSeek-R1 Reasoning Capabilities: The model features explicit step-by-step reasoning processes designed to solve intricate logical, mathematical, and programming challenges. Users can inspect the generated thought process for full transparency.
- Ultra-Low Cost API: Thanks to structural architectural optimizations, DeepSeek offers API pricing significantly cheaper than established cloud competitors. Built-in prompt caching further reduces costs for repeated context queries.
- Open-Weights and Local Hosting: Model weights for DeepSeek-V3 and R1 are published under open licenses. This enables enterprises and developers to run models entirely on self-hosted local or cloud servers for maximum control.
When a different tool fits better
DeepSeek should not be used via its hosted cloud service when strict GDPR compliance is mandatory or when data processing outside the EU/EEA is prohibited. It is also unsuitable for handling highly confidential corporate secrets or sensitive personal health data unless deployed entirely locally.
Pricing & plans
Plans in detail
- Web AccessFree0 €unlimited
- Access to DeepSeek models via web interface
- No subscription required
- APIfrom 0.14 $ / 1M tokensfrom 0.13 € / 1M tokensPay-as-you-go
- Affordable token-based pricing
- No monthly base fee
Good to know
- Web usage is currently free of charge.
- API pricing varies based on the model (e.g., DeepSeek-V3 or R1) and token type (input/output).
- API credits must be pre-loaded.
Prices checked on 15/08/2026. Prices based on public provider information, without warranty. Euro amounts are approximations; the provider's pricing page prevails.
Supported languages
The user interface is available in English and Chinese, while the underlying model generates high-quality output in German and many other languages.
Interface = the tool's menu language, content = the language you can work in. Without guarantee — vendors keep expanding their language coverage.
Privacy & GDPR
Data flow: Inputs submitted via the web interface and cloud API are processed on servers in the People's Republic of China and are subject to domestic jurisdiction.
Training on your inputs: Data from the free web interface may be used for model training and optimization, whereas API inputs are stated to be excluded from training.
For companies: Standard API terms apply, but formal GDPR-compliant Data Processing Agreements (DPAs) or EU Standard Contractual Clauses are not provided.
Practical advice: Do not enter personally identifiable information (PII), sensitive corporate trade secrets, or GDPR-regulated confidential data into the cloud service.
- GDPR:
- EU data protection regulation: defines how personal data may be processed and what rights you have (access, deletion, objection).
- SCC (Standard Contractual Clauses):
- EU model clauses that let a provider legally process data outside the EU.
- DPA:
- Data Processing Agreement: contractually binds the provider to process your data only on your instructions. Usually mandatory for companies.
- On-premises / local:
- The model runs on your own machine or server. Data never leaves your network — the safest option from a privacy standpoint.
- Training on user data:
- Your inputs may feed into future model versions. Confidential content could in theory resurface in other users' answers.
Privacy data checked on 02/08/2026. Editorial summary based on public provider information — not legal advice. When in doubt, check the provider's current privacy terms.
Fact sheet
| Vendor | Hangzhou DeepSeek Artificial Intelligence Co., Ltd. |
|---|---|
| Headquarters | Hangzhou, China |
| Category | General AI |
| Pyramid level | Level 1 – General Assistants & Reasoning LLMs |
| Pricing model | Freemium |
| Free forever option | Limited |
| Open Source | No |
| Entry plan | Web Access: Free (0 €) |
| German | content only, English interface |
| English | interface and content |
| Additional languages | 4 |
| Privacy classification | Unclear |
| Data processing agreement | Standard API terms apply, but formal GDPR-compliant Data Processing Agreements (DPAs) or EU Standard Contractual Clauses are not provided. |
Alternatives to DeepSeek
- ChatGPT — Freemium · HQ: San Francisco, United States · GDPR / EU
- Claude AI — Freemium · HQ: San Francisco, United States · GDPR / EU
- Google Gemini — Freemium · HQ: Mountain View, United States · US Cloud
- Mistral Le Chat — Freemium · HQ: Paris, France · GDPR / EU
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