Independent resource · Not affiliated with DeepSeek
Independent DeepSeek AI Guide and Browser Chat
DeepSeek develops AI models available through its official web chat, mobile apps, developer API, and open-weight releases. Chat-Deep.ai is an independent guide and separate browser chat. It is not operated by, endorsed by, or affiliated with DeepSeek.
Use this page to reach verified official DeepSeek services, understand current models and API pricing, compare access options, and explore independent research. When you use Chat-Deep.ai’s browser chat, your prompt and the context needed to answer it are sent to the DeepSeek API. Use official DeepSeek pages for accounts, passwords, API keys, billing, app downloads, and support.
Last verified: August 24, 2026 · Official DeepSeek homepage, API model and pricing table, Vision guide, Files API, and changelog sources checked. Dated independent tests remain labeled separately.
What Is DeepSeek AI?
DeepSeek is a Chinese artificial intelligence company founded in 2023. It develops large language models and AI systems for reasoning, coding, writing, research, image understanding, document workflows, and application development.
The name “DeepSeek” can describe several related things: the company, its official chat and mobile apps, the developer platform and API, or model families such as V4, R1, V3, Coder, Math, VL, and OCR. These are not interchangeable products. Available features, model names, privacy terms, costs, and infrastructure requirements depend on the access path you choose.
Everyday users can use the official chat or app. Developers can connect applications through the API. Technical teams can evaluate eligible open-weight releases using DeepSeek’s verified repositories and compatible local or cloud infrastructure. Always check the model card and license for the exact release; hosted API availability does not automatically mean that the same model is downloadable.
What can DeepSeek be used for?
- Writing and learning: drafting, rewriting, translation, summaries, explanations, and study material.
- Reasoning and coding: code generation, debugging, testing, technical planning, and structured problem solving.
- Images and documents: screenshot, chart, and image understanding through supported vision models and properly supplied context.
- Applications and automation: chatbots, structured output, tool-using workflows, RAG systems, agents, and internal assistants.
- Open-weight evaluation: local or private testing where the selected release, license, hardware, and operational controls permit it.
Important limitation: DeepSeek can produce incorrect, incomplete, outdated, biased, or fabricated information. Verify consequential outputs against reliable sources and require qualified human review for legal, medical, financial, security, employment, education, and other high-impact decisions.
Choose the Right Way to Use DeepSeek
The appropriate route depends on whether you want a quick conversation, an official account, a developer integration, or control over the infrastructure. Start with the simplest route that meets your needs and data policy.
| Access path | Suitable for | What to know before using it |
|---|---|---|
| Official DeepSeek Chat | Questions, writing, learning, coding help, and account-based hosted chat. | Use the official domain. Review DeepSeek’s privacy terms before sharing personal or business data. |
| Official mobile app | Hosted DeepSeek access on supported mobile devices. | Install only through the official download route or a verified app-store listing. Check the publisher name. |
| DeepSeek API | Apps, agents, automations, internal tools, coding systems, and RAG workflows. | Requires a developer account, secure server-side key storage, token budgeting, monitoring, and production safeguards. |
| Open-weight or self-hosted model | Research, evaluation, customization, private infrastructure, and technical control. | Requires compatible hardware or hosting, model-specific license review, patching, access control, logging, and security operations. |
| Chat-Deep.ai browser chat | Quick independent browser chat without using a DeepSeek account on this site. | Not an official DeepSeek service. Prompts and required context are sent to the DeepSeek API. Ads or usage limits may apply. |
Need practical help? Use the DeepSeek Chat guide, review the app guide, or open the DeepSeek API guide.
Official DeepSeek Links
Use these official destinations for DeepSeek products, accounts, downloads, developer access, billing, service incidents, and privacy terms. Chat-Deep.ai provides independent explanations, research, safety guidance, and separate browser chat access; it does not replace DeepSeek’s official services.
| What you need | Official destination | Use it for |
|---|---|---|
| Official website | DeepSeek | Product entry points, research resources, legal pages, app access, chat, and API links. |
| Official chat | chat.deepseek.com | Hosted DeepSeek Chat and official account-based chat access. |
| Official app | DeepSeek app download page | Verified routes to DeepSeek’s mobile app listings. Check the publisher before installing. |
| Developer platform | DeepSeek Platform | API accounts, API keys, balance, billing, usage, and developer access. |
| API documentation | DeepSeek API Docs | Endpoints, request formats, model behavior, features, errors, rate limits, and migration guidance. |
| API pricing | Models & Pricing | Official model names, token rates, context limits, output limits, and billing notes. |
| Service status | DeepSeek Status | Incidents, maintenance, availability, and official service updates. |
| Privacy terms | DeepSeek Privacy Policy | Official information about data collection, processing, retention, transfers, and user rights. |
Account safety: Never enter a DeepSeek password or API key on Chat-Deep.ai or another unofficial page. Use the official chat for hosted-chat accounts and the official platform for API keys, billing, and usage records.
Current DeepSeek Models and API Pricing
DeepSeek’s official Models & Pricing table currently lists three hosted API model IDs. All three list a 1M context length, a maximum output of 384K, JSON Output, Tool Calls, and native Responses API support.
| API model | Practical positioning | Status and key limit |
|---|---|---|
deepseek-v4-flash | Lower-cost text model for high-volume tasks, coding, automation, and agents. | Serves DeepSeek-V4-Flash-0731 in public beta; concurrency limit 2,500. |
deepseek-v4-flash-vision-exp | Multimodal model for screenshots, charts, interfaces, image text, and visual agents. | Experimental; concurrency limit 2,500; image input supported; FIM not supported. |
deepseek-v4-pro | Text model for more demanding reasoning, coding, document analysis, and agent workflows. | Serves DeepSeek-V4-Pro-0813 in GA; concurrency limit 500. |
The API is separate from free official hosted chat. Prices below are in US dollars per one million tokens. Peak hours are 01:00–04:00 and 06:00–10:00 UTC, Monday through Friday. Every other hour is off-peak, and off-peak rates are half the peak rates.
| Model | Off-peak: cache hit / cache miss / output | Peak: cache hit / cache miss / output |
|---|---|---|
deepseek-v4-flash | $0.007 / $0.22 / $0.66 | $0.014 / $0.44 / $1.32 |
deepseek-v4-flash-vision-exp | $0.007 / $0.22 / $0.66 | $0.014 / $0.44 / $1.32 |
deepseek-v4-pro | $0.022 / $0.66 / $1.98 | $0.044 / $1.32 / $3.96 |
Vision input: Images sent to deepseek-v4-flash-vision-exp are converted into tokens based on their dimensions and billed as input tokens. DeepSeek documents supported image input through an HTTP(S) URL, a Base64 data URL, or a file_id created through its image-focused Files API. This does not make the Files API a general PDF or DOCX upload service. Read the Vision Exp guide before implementation.
Prices, limits, and availability can change. Verify the official pricing table before topping up a balance or approving a production budget. See the API pricing guide, API guide, and dated API updates tracker for details.
Original DeepSeek Research & Public Data
Chat-Deep.ai publishes independent, dated tests separately from official product documentation. Each report identifies its methodology, measured scope, evidence, and limitations.
- Global Reliability & API Performance Report: multi-region monitoring of availability, latency, success rates, and API behavior.
- DeepSeek 1M Context Benchmark: matched V4 Flash and Pro retrieval tests across 32K to approximately 950K prompt tiers, with public data archived under DOI 10.5281/zenodo.21838863.
- DeepSeek Citation Accuracy Audit: a reproducible 48-question review of source validity, claim support, completeness, and authority.
Privacy, Security, and Safer Use
Protect sensitive information
Do not paste passwords, API keys, authentication tokens, signing keys, confidential contracts, customer records, health data, financial records, or sensitive personal information into an unapproved AI service.
Verify consequential answers
Check claims against primary sources, test generated code before deployment, and require qualified review for legal, medical, financial, security, compliance, employment, or customer-facing decisions.
Control production access
Store API keys server-side, isolate users and tenants, restrict agent tools, monitor spending, defend against prompt injection, log safely, and require approval for consequential actions.
Self-hosting is not automatically private
Local or private infrastructure can provide more control, but privacy still depends on the complete system: hosting, networking, telemetry, plugins, logs, backups, administrators, access controls, and patching.
Regional rules and workplace policies differ. Check authoritative local guidance and your organization’s requirements. Start with the Privacy & Security Center and DeepSeek safety guide.
DeepSeek for Developers and Business Teams
A useful production decision asks whether a defined workflow can create measurable value with acceptable quality, cost, privacy, security, and operational risk.
- Applications: define acceptable errors, evaluate representative tasks, estimate token costs, and add monitoring before production traffic.
- RAG and internal knowledge: enforce document permissions, tenant isolation, citations, retention rules, and escalation when evidence is missing.
- Agents and automation: use minimum permissions, tool allowlists, approval gates, rate limits, spending controls, audit logs, and rollback paths.
Explore DeepSeek Business Solutions, Enterprise AI, and the RAG Knowledge Base guide.
How Chat-Deep.ai Verifies This Guide
Chat-Deep.ai separates official facts from independent analysis so readers can identify the source and scope of each claim.
- Official product facts are checked against DeepSeek’s website, platform, API documentation, pricing, status, privacy policy, changelog, and verified model repositories.
- Time-sensitive claims include a visible verification date. Prices, model IDs, limits, and availability should be checked again before consequential decisions.
- Independent tests retain their original dates, methodology, measured scope, evidence, and limitations.
- Chat-Deep.ai product statements describe this site only; its browser chat is not the official DeepSeek chat, app, platform, or support service.
- The visible verification date changes only after the affected facts and links have been rechecked.
Read the Editorial Policy, learn more About Chat-Deep.ai, and review the independent reliability report.
DeepSeek AI FAQ
Is Chat-Deep.ai the official DeepSeek website?
No. Chat-Deep.ai is an independent guide and separate browser chat. DeepSeek’s official website is DeepSeek.com, its hosted chat is at chat.deepseek.com, and developer accounts are managed at platform.deepseek.com.
Is DeepSeek free?
DeepSeek’s official homepage presented hosted chat as free to access when rechecked on August 24, 2026. API usage is separate and billed by token. Free access does not guarantee unlimited use, permanent features, or identical availability in every region.
Which DeepSeek API models are currently listed?
The official table currently lists deepseek-v4-flash, deepseek-v4-pro, and the experimental deepseek-v4-flash-vision-exp. Check the official table before production changes because the catalog can change.
Does the DeepSeek API support images?
Yes. deepseek-v4-flash-vision-exp supports image input through supported HTTP(S) URLs, Base64 data URLs, or an image file_id. Flash and Pro are text models, and general PDF or DOCX file input should not be inferred from the image-focused Files API.
Is DeepSeek safe for business data?
Do not assume that any hosted or third-party AI service is approved for confidential or regulated data. Review the access path, privacy terms, data classification, retention, region, security controls, contracts, and organizational policy.
Can DeepSeek run locally?
Eligible open-weight releases can run on compatible local or private infrastructure. Hardware and licensing requirements vary, and local deployment is private only when the complete runtime, storage, network, access, logging, and maintenance environment is properly controlled.