DeepSeek
An open-weight AI assistant from DeepSeek, whose R1 reasoning model (2025) matches frontier performance at a fraction of the cost and is fully released on GitHub.
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Overview
DeepSeek is the consumer chat app and model family from DeepSeek, the Chinese research lab that shook the industry by releasing frontier-class reasoning models as open weights at a fraction of the usual cost. The web and mobile apps are free and put those models — including the reasoning-first R1 line — directly in your hands.
It is especially strong at mathematics, code and step-by-step reasoning, and its open licenses let anyone self-host or fine-tune. For developers and cost-sensitive teams it has become the reference for getting near-frontier quality without frontier pricing.
Pros / Cons
Pros
- Completely free web and app access to frontier-class models
- Open-weight releases enable self-hosting and fine-tuning
- Excellent math, code and chain-of-thought reasoning
- Dramatically cheaper API pricing than Western rivals
Cons
- Data handling and residency raise compliance questions for some organizations
- Product surface (integrations, plugins) is thinner than Western rivals
- Peak-time congestion can slow the free tier
Who it's for
Math, logic and step-by-step reasoning problems
Coding assistance on a budget, via app or cheap API
Self-hosting and fine-tuning open-weight models
Bottom line
Unmatched value in AI today: frontier-class reasoning, free at the point of use and open where it counts.
Key Features
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Frequently asked questions
What is DeepSeek?
DeepSeek is a Conversational AI tool developed by DeepSeek. The company was founded in 2023 and is headquartered in Hangzhou, China. An open-weight AI assistant from DeepSeek, whose R1 reasoning model (2025) matches frontier performance at a fraction of the cost and is fully released on GitHub.
Is DeepSeek free?
Yes — DeepSeek is free to use.
Is DeepSeek open source?
Yes — DeepSeek is open source. The source code is publicly available at https://github.com/deepseek-ai/DeepSeek-R1.
What are the best alternatives to DeepSeek?
Notable Conversational AI alternatives include ChatGPT, Claude, Gemini. Browse all 4 tools in our Conversational AI category for a full overview.
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Basic Info
- Pricing
- Free
- Rating
- ★ 4.7 (9,200 reviews) Ratings explained
- Platforms
- WebiOSAndroidAPI
- Founded
- 2023
- Headquarters
- Hangzhou, China
- Last verified
- 2026-09-11
