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DeepSeek

AI Chat & General Assistants

DeepSeek is a chatbot from the Chinese AI company of the same name, built on its open-weight V-series models (V4 as of 2026). The consumer app is free and offers a reasoning mode (DeepThink), web search, file reading and a very long context window. Developers use its low-cost API or run the open weights themselves.

Free planFree
Pricing

DeepSeek pricing

Free plan: yes (chat app is free); API pay-as-you-go, no consumer subscription

Last checked September 2026 · Confirm on deepseek.com

Features

What DeepSeek does

  • DeepThink reasoning mode that shows step-by-step thinking
  • Web search toggle with linked sources
  • Upload documents and images for text extraction and analysis
  • Up to 1M-token context in the app
  • Open-weight models that can be self-hosted
  • Low-cost pay-as-you-go API

Pros

  • Consumer app is free with no paid tier needed
  • Strong reasoning, math and coding performance
  • Open weights allow private self-hosting
  • API is inexpensive for developers

Cons

  • No image generation or native voice conversations
  • No custom assistants, deep research agent or code-running sandbox in the app
  • Data is processed on servers in China, which some organizations and governments restrict
  • Answers on politically sensitive topics are filtered
Fit

Who DeepSeek is for

Budget-conscious studentsDevelopers wanting a cheap APITeams able to self-host open models

Look elsewhere if: Businesses with strict data-sovereignty rules or anyone who needs images, voice or agent features should use another assistant.

Enterprise: Consumer chat app plus pay-as-you-go API; no business chat tier with admin or compliance controls, and data is processed in China.

Chat Assistants feature checklist
Web search with sourcesYes
Image generationNo
Voice conversationsNo
File & PDF analysisYes
Custom assistants / GPTsNo
Runs code / data analysisNo
Deep research modeNo
Mobile appsYes
Developer APIYes

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