DeepSeek is an AI company and ecosystem that includes an official chat assistant, mobile app, developer API, model families, open model releases, and research resources. Chat-Deep.ai is an independent DeepSeek guide and browser chat access site. It is not the official DeepSeek website, official app, official API platform, billing portal, or support channel.
Last reviewed: May 14, 2026. Sources checked include the official DeepSeek website, official chat, official app download route, official platform, API documentation, API pricing page, service status page, privacy policy, terms, GitHub, Hugging Face, and reputable company-background sources.
DeepSeek in One Sentence
DeepSeek is a fast-moving AI ecosystem that combines a hosted chatbot, mobile app, developer API, reasoning and coding models, open model resources, and research releases under one brand.
What Does “DeepSeek” Mean?
People use the word “DeepSeek” in several different ways. A user searching for DeepSeek may want the company, the official chatbot, the mobile app, the developer platform, the API, a model family, or open model resources.
| Meaning | What it refers to | Best next step |
|---|---|---|
| DeepSeek company | The organization behind DeepSeek products, models, research, and developer services. | Read the company background |
| DeepSeek Chat | The official hosted chat assistant experience. | Try browser chat or learn the difference |
| DeepSeek app | The mobile app route for users who want access on iOS or Android. | Read the DeepSeek App guide |
| DeepSeek Platform | The official developer platform for API keys, account access, and billing. | Read the API guide |
| DeepSeek API | The developer interface for connecting DeepSeek models to apps, tools, agents, and workflows. | Start with the DeepSeek API guide |
| DeepSeek models | Model families such as V4, R1, Coder, OCR, V3, and local or open-weight releases. | Compare DeepSeek models |
| DeepSeek open models / research | Public model weights, repositories, technical reports, and research resources. | Explore local DeepSeek options |
Who Created DeepSeek?
DeepSeek’s official Open Platform Terms identify Hangzhou DeepSeek Artificial Intelligence Co., Ltd. as the owner and operator of the DeepSeek Open Platform. For users and developers, this matters because official account access, API keys, billing, platform terms, and developer obligations belong to the official platform, not to independent guide sites.
DeepSeek is widely described as a China-based AI company founded in 2023. Reuters reported that DeepSeek is a Hangzhou-based startup whose controlling shareholder is Liang Wenfeng, co-founder of the quantitative hedge fund High-Flyer. AP also reported that Liang Wenfeng founded DeepSeek in 2023 and connected his earlier High-Flyer work to machine-learning-driven trading and AI infrastructure.
This background matters for users, developers, businesses, schools, and public-sector teams because DeepSeek is not only a chatbot. It is part of a broader AI ecosystem that includes research releases, API services, model weights, app access, and hosted AI products. Teams that handle sensitive data should review official terms, privacy policies, local rules, and organization policies before using hosted DeepSeek services.
What Products Are Part of the DeepSeek Ecosystem?
The DeepSeek ecosystem includes official user-facing products, developer resources, model repositories, and status pages. Use official sources for account access, app downloads, API keys, pricing, and status.
| Product or resource | Official source | Use it for |
|---|---|---|
| Official website | DeepSeek.com | General official entry point, product links, research links, and official destinations. |
| Official chat | chat.deepseek.com | Hosted DeepSeek Chat access. |
| Official app | download.deepseek.com | Official mobile app download route. |
| Developer platform | platform.deepseek.com | API keys, developer accounts, usage, billing, and platform access. |
| API docs | api-docs.deepseek.com | API setup, model IDs, compatibility notes, guides, and technical references. |
| API pricing | official pricing page | Current token pricing and billing details. |
| Status page | status.deepseek.com | Official service availability, incidents, and uptime history. |
| GitHub / Hugging Face | GitHub / Hugging Face | Public repositories, model pages, model cards, and research resources. |
For a clean directory of official destinations, see our Official DeepSeek Links guide.
How Does DeepSeek Work?
DeepSeek models use large language model technology to process prompts and generate outputs. A user provides text, code, documents, or instructions; the model predicts a useful response based on patterns learned during training and later refinement.
At a beginner level, DeepSeek can be understood as a system for language, code, reasoning, and structured-output tasks. It can answer questions, summarize text, explain code, draft documents, analyze instructions, and help developers build AI-powered workflows.
- Large language models: used for chat, writing, coding, summarization, extraction, and structured output.
- Prompt input and generated output: users provide instructions, and the model generates a response that still needs verification.
- Reasoning modes: useful for multi-step math, logic, planning, code reasoning, and complex analysis.
- Efficient architectures: some DeepSeek releases use MoE-style designs, where only part of the model is active for each token.
- Post-training and instruction tuning: used at a high level to make models more useful for following instructions and handling real tasks.
DeepSeek outputs can still be wrong, outdated, incomplete, or unsuitable for professional use. For technical details, model comparisons, and current availability, read our DeepSeek Models guide.
Main DeepSeek Model Families
DeepSeek has released or discussed several model families for chat, reasoning, coding, OCR, multimodal research, and local experimentation. This is only a high-level overview; the dedicated model hub is the better place for detailed comparisons.
V-series / V4
General-purpose hosted and API-oriented models, including speed-focused and reasoning-focused options.
R-series / R1
Reasoning-focused models often discussed for math, logic, step-by-step analysis, and open model research.
V3 / V3.2
Earlier general-purpose and reasoning-oriented model families that are still useful for historical and migration context.
Coder
Code-focused model work for programming, debugging, code review, documentation, and developer workflows.
OCR / vision-language
Model work related to image-text, OCR, visual document understanding, and multimodal research.
Local and open options
Open-weight or local model options may be useful for offline testing, private evaluation, and self-hosted experiments.
Model note: Model names, availability, API IDs, pricing, licenses, and context limits can change. Verify the official documentation before production use.
Continue with the DeepSeek Models guide, DeepSeek R1 guide, DeepSeek-R1-0528 guide, DeepSeek OCR guide, or Run DeepSeek Locally guide.
Current DeepSeek API Model Names
As of this page’s last review, the official DeepSeek API documentation lists deepseek-v4-flash and deepseek-v4-pro as current API model names. The same documentation says older names such as deepseek-chat and deepseek-reasoner are compatibility aliases scheduled for deprecation on 2026/07/24.
Developers should avoid hard-coding outdated model names without monitoring official documentation. Model names, migration dates, context limits, pricing, and feature behavior can change.
For implementation details, see our DeepSeek API Guide, DeepSeek Pricing Guide, and the official DeepSeek API Docs.
Is DeepSeek Free?
DeepSeek chat and app access may be free or limited depending on the current official offer, account status, region, usage limits, and service availability. API usage is separate from chat or app access and is usually billed by tokens.
Local or open-weight model use may be free to download or use under a specific license, but hardware, hosting, electricity, storage, engineering time, and maintenance are not free.
For details, read Is DeepSeek AI Free? and our DeepSeek Pricing Guide.
Is DeepSeek Safe?
DeepSeek safety depends on how you use it: official chat, official app, API, local models, or third-party tools. Each route has different privacy, security, compliance, and data-handling considerations.
Users should not paste passwords, API keys, private documents, customer data, regulated data, legal or medical secrets, financial records, or confidential business information into AI tools without review and appropriate controls.
DeepSeek’s privacy policy says user input such as prompts and uploaded files may be collected. It also says personal data may be stored outside the user’s country and processed and stored in the People’s Republic of China. Review official privacy terms before sensitive or regulated use.
For details, read our DeepSeek Safety Guide, Security guidance, and Privacy Policy.
Why the Name DeepSeek Can Be Confusing
The name “DeepSeek” is used for multiple things. One person may mean the official website. Another may mean DeepSeek Chat. A developer may mean the API. A researcher may mean R1, V4, OCR, GitHub repositories, Hugging Face model pages, or local model experiments.
This is why Chat-Deep.ai separates official DeepSeek links from independent guides. For passwords, API keys, billing, app downloads, legal terms, and official support, use official DeepSeek sources. For explanations, comparisons, tutorials, safety notes, and browser chat access, use Chat-Deep.ai guides.
Where Should Beginners Start?
Want official access?
Use the official website, official chat, official app, platform, pricing, and status links.Open official DeepSeek links
Want to chat?
Use the browser chat page for independent access and guidance.Open DeepSeek Chat
Want to learn usage?
Learn how to write prompts, use web chat, use the app, and avoid privacy mistakes.Read the usage guide
Want the app?
Follow safe app download guidance and avoid fake app listings.Read the app guide
Need login help?
Separate official chat login, platform login, and no-account browser alternatives.Read the login guide
Want API access?
Learn setup basics, model names, compatibility, pricing, and production cautions.Read the API guide
Need pricing?
Understand token pricing, cache-hit input, cache-miss input, and output token costs.Read the pricing guide
Want model details?
Compare V4, R1, OCR, Coder, local options, and API model choices.Compare models
Need safety guidance?
Review privacy, data handling, sensitive prompts, and responsible use.Read the safety guide
DeepSeek vs ChatGPT in Brief
DeepSeek and ChatGPT are both AI assistant ecosystems, but the better choice depends on the task. DeepSeek may be attractive for cost-sensitive API evaluation, reasoning workflows, long-context testing, open model research, and local experimentation. ChatGPT may be a better fit for users who want a polished general-purpose assistant, mature workspace features, and a broader product ecosystem.
The right comparison depends on pricing, model behavior, app experience, API needs, local or open-model requirements, privacy expectations, and the tools your team already uses.
Read the full DeepSeek vs ChatGPT comparison.
FAQ
What is DeepSeek?
DeepSeek is an AI company and ecosystem that includes an official chat assistant, mobile app, developer API, model families, open model releases, and research resources.Is DeepSeek the same as DeepSeek Chat?
No. DeepSeek Chat is one product within the broader DeepSeek ecosystem. DeepSeek can also refer to the company, app, API platform, model family, open models, and research releases.Is Chat-Deep.ai official?
No. Chat-Deep.ai is an independent DeepSeek guide and browser chat access site. It is not the official DeepSeek website, app, API platform, billing portal, or support channel.Who created DeepSeek?
DeepSeek is associated with Hangzhou DeepSeek Artificial Intelligence Co., Ltd. and Liang Wenfeng, who is widely reported as DeepSeek’s founder and linked to High-Flyer.Is DeepSeek free?
Chat and app access may be free or limited depending on current official terms, account status, region, usage limits, and service availability. API use is separate and usually token-based.Does DeepSeek have an API?
Yes. DeepSeek provides a developer API through the official DeepSeek Platform. Read our DeepSeek API Guide before building or deploying.Is DeepSeek safe?
Safety depends on how it is used. Do not enter sensitive data, passwords, API keys, private documents, or regulated information without review and appropriate controls.What is the best way to start with DeepSeek?
Start with the Official DeepSeek Links guide, then choose chat, app, API, pricing, models, or safety guidance based on your goal.
Final Summary
DeepSeek is more than a chatbot. It includes a company, official chat assistant, mobile app, API platform, model families, open model resources, and research releases. The right DeepSeek destination depends on whether you want to chat, download the app, create an API key, compare models, check pricing, review safety, or understand the company behind the ecosystem.
Users should verify official account, billing, app, API, pricing, legal, and service status information from official DeepSeek sources. Chat-Deep.ai provides independent guides, explanations, comparisons, safety notes, and browser chat access.
To learn how we review and update pages, read our Editorial Policy. For corrections or feedback, contact Chat-Deep.ai.