How to Use DeepSeek 4 Web Version? Complete Step-by-Step Guide
The DeepSeek 4 Web Version is the official free entry point, allowing you to experience long-context, multimodal, and coding capabilities without any installation. This guide will walk you through everything from finding the correct entry point and selecting versions to troubleshooting common issues, helping you master deepseek4.
1. Identify and Enter the Correct Official URL
The only officially maintained primary entry point for the DeepSeek 4 Web Version is https://www.deepseek.com. This address does not rely on third-party redirects and is secured with HTTPS. Any links ending with “deepseek.ai”, “deepseek.org”, “deepseek-web.com”, etc., are not official and pose security risks.
- In the address bar of Chrome, Firefox, or Edge, type exactly
https://www.deepseek.com. Ensure there is no trailing slash, no spaces, and that you are not using Chinese input mode. - Press Enter and wait for the page to load completely. If you see “This site can’t be reached,” check if your current network blocks foreign domains (some corporate or campus networks have restrictions).
- Upon successful loading, the page header should display the “DeepSeek” logo, with 【Login】 and 【Start Chat】 visible in the top-right corner.
2. Distinguishing Between Main Site, API, and Documentation Entries
Some users mistakenly use internal testing addresses or API documentation pages as the primary entry for the DeepSeek 4 Web Version, resulting in missing features. The official distinctions are as follows:
| Type | Address | Description |
|---|---|---|
| Main Service Entry (Recommended for daily use) | https://www.deepseek.com | Supports all front-end features including login-free lightweight chat, file uploads, model switching, etc. |
| API Interface (For developers) | https://api.deepseek.com/v1/chat | RESTful interface, cannot be opened directly in a browser; requires code and an API Key for calls. |
| Documentation & Console | https://platform.deepseek.com/docs | Technical documentation and SDK examples; no chat input box. |
For daily use of deepseek4, always use the main site: www.deepseek.com.
3. How to Choose a DeepSeek 4 Version (Selectable within the Web Version)
Within the DeepSeek 4 Web Version, you can select models based on your scenario:
- DeepSeek V4 (Flagship): 1.5 Trillion MoE 2.0 (32B activated parameters), 1M Token context. Ideal for long texts, complex reasoning, multimodal tasks, and full-stack development.
- DeepSeek V4 Lite: 70B dense parameters, 32K Token context. Extremely fast and lightweight, suitable for high-frequency interactions and automated processing.
- DeepSeek Coder V4: Trained on 2T code tokens, 1M Token context. Specialized in software engineering, cross-file analysis, and bug fixing.
After logging in, select the corresponding model and start using it via chat, document upload, or image upload.
4. What to Do If Access Fails
If you cannot access the site after entering the correct URL, follow these self-check steps:
- Clear Browser DNS Cache: In Chrome/Edge address bar, enter
chrome://net-internals/#dnsand click 【Clear host cache】. In Firefox, visitabout:networking#dnsand click 【Clear DNS Cache】. - Force Refresh: Press
Ctrl + Shift + Ron Windows/Linux, orCmd + Shift + Ron macOS to bypass old cache. - Change DNS: Switch your system DNS to 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) to mitigate ISP hijacking or resolution failures.
5. Accessing DeepSeek 4 Web Version on Mobile
The DeepSeek 4 Web Version does not have a dedicated mobile app, but it adapts when accessed via a mobile browser. Recommendations:
- In iOS Safari or Android Chrome, do not click links from official accounts, group chats, or short URLs. Always manually type
https://www.deepseek.com. - If you are redirected to subdomains like m.deepseek.com and experience issues, close the tab and manually re-enter the main domain.
- Enable “Request Desktop Site” in your mobile browser (Safari: bottom AA menu; Chrome: three-dot menu → “Desktop site”) to get the same functional layout as on PC.
The DeepSeek 4 Web Version is free to use, excelling in long-context, multimodal, and coding capabilities, with costs estimated at about 1/70 of similar products. It’s suitable for individuals and businesses to get started quickly. Ensure you use the official main site for a secure and smooth experience.