❓ DeepSeek FAQ

DeepSeek is an open-source LLM family. The current flagships are the DeepSeek V4 Pro official release and V4 Flash. This site, deepseek.day, gives you a web chat entry, API notes, tutorials and benchmarks so people searching for DeepSeek can start quickly.

No. This is an independent tech community, not affiliated with the DeepSeek company. We organize usage guides, reviews and entry points. Official API consoles remain at platform.deepseek.com.

Yes — click Start Chat on this site. No download required. Use it to try writing, coding and long documents, then get an API key from the official platform when you need to build.

Three steps: 1) start a web chat here; 2) get an API key at platform.deepseek.com if you are building; 3) set base_url to https://api.deepseek.com/v1 and reuse your OpenAI SDK. Tutorials include copy-paste examples.

The models are strong in Chinese and English and also handle code. This site UI covers 24 languages. Try the web app first for office writing, coding or translation.

Email deepseek4@limaxai.com or join Discord. We keep adding DeepSeek tutorials based on the questions people actually search.

DeepSeek AI usually means the company and the Hugging Face org deepseek-ai; DeepSeek is the product (web app, API, V4 models). Independent guide: /en/deepseek-ai/. This site is not official.

The official release improves reasoning stability over preview and introduces peak/off-peak pricing. Pro is for long context and hard tasks; Flash is for cheap high-volume calls. New projects should use V4 Pro or V4 Flash, not retired model names.

Web chat can start free. The API usually includes a free quota, then token billing — peak hours can cost more. Check the official pricing page. Our tutorials cover Flash and caching to control cost.

V4 Pro (~671B MoE) offers ~1M context, deep reasoning and vision. V4 Flash (~37B) is faster and cheaper. Pick Pro for long reports, hard code and images; pick Flash for support, summaries and high QPS.

V4 Pro supports vision-primitive image understanding. Both Pro and Flash are MIT-licensed and commercial-friendly, with weights on Hugging Face. Read the license and official notes before deploying.

Register at platform.deepseek.com and create a key in the console. Keep it in environment variables — never commit it to a public repo.

Yes. Set base_url to https://api.deepseek.com/v1 and switch the model ID to V4 Pro or V4 Flash. OpenAI SDKs and LangChain usually migrate in minutes.

New users typically get free credits; exact numbers are on the official pricing page. Peak/off-peak means higher unit prices at busy hours and lower prices off-peak — batch jobs fit the cheap window.

Yes, SSE streaming via stream: true, which is ideal for chat UIs. Python and JavaScript samples are in Tutorials.

Open the web app here and run one real task (for example, review this code). If the result looks good, get an API key and follow Quick Start for the first call.

Ollama is the fastest trial path; vLLM or SGLang suit production. You will need GPU memory and a quantization plan. Laptops should start with the web app.

Yes. Coding scores are strong, and Chinese/English email, minutes, slide outlines and translation are common uses. State audience, length and what not to invent, then ask for a structured output.

Official SDKs cover Python, JavaScript, Go, Java and Rust. Do not dump a whole corpus into the window — retrieve or slice first, then send the key passages. That cuts cost and hallucinations.

DeepSeek Harness is the August 2026 open-source agent runtime — not a new model. V4 Pro reasons; Harness edits files, runs a shell and composes agents. Use the web app to chat first, then the DeepSeek API to integrate. Independent guide: /en/blog/deepseek-harness-guide/

Set Claude Code’s ANTHROPIC_BASE_URL to https://api.deepseek.com/anthropic and use your DeepSeek API key as ANTHROPIC_AUTH_TOKEN. Setup guide: /en/claude-code-deepseek/