DeepSeek

Powerful open AI at a fraction of the cost

Freemium

Categories: Research, Code Assistant, Chatbots

DeepSeek is a Chinese AI company whose DeepSeek-V3 and R1 models achieved performance matching or exceeding GPT-4o and Claude 3.5 Sonnet at a fraction of the training cost, sending shockwaves through the AI industry. The open-source R1 reasoning model offers transparent chain-of-thought reasoning that rivals OpenAI's o1 series while being freely available for download and deployment. AI developers and researchers worldwide use DeepSeek models as powerful, cost-efficient alternatives to proprietary models, with the open-weight releases enabling fine-tuning, local deployment, and derivative research without any API costs.

DeepSeek is an AI-powered Research tool listed on Nextool.ai, a directory of 10,000+ AI tools. DeepSeek offers a freemium model with both free and paid plans. Consumer chat app: free on web, iOS, and Android. API (pay-per-token, no subscription; charged against a topped-up balance): deepseek-v4-flash — $0.14 per million input tokens (cache miss) or $0.0028 (cache hit), and $0.28 per million output tokens. deepseek-v4-pro — $0.435 per million input tokens (cache miss) or $0.003625 (cache hit), and $0.87 per million output tokens. Context caching delivers roughly a 50x discount on repeated input tokens. The legacy model names deepseek-chat and deepseek-reasoner now route to deepseek-v4-flash (non-thinking and thinking mode respectively). Browse the Research category on Nextool.ai to compare similar tools, read reviews, and find the best fit for your workflow.

Key Features

DeepSeek-V4 flagship family with unified thinking and non-thinking modes
1M-token context window with up to ~384K-token maximum output
Free consumer chat app across web, iOS, and Android
Low-cost, OpenAI-compatible API priced from $0.14 per million input tokens
Context caching with steep cache-hit discounts (~50x cheaper repeated input)
Strong reasoning lineage (R1) and coding capability (Coder line)
Improved agent and tool-use functionality for multi-step tasks
Open research heritage with publicly documented model releases

Use Cases

Using powerful AI at lower cost
Code generation and debugging
Complex reasoning tasks
Research on open-source LLMs

Pricing

Consumer chat app: free on web, iOS, and Android. API (pay-per-token, no subscription; charged against a topped-up balance): deepseek-v4-flash — $0.14 per million input tokens (cache miss) or $0.0028 (cache hit), and $0.28 per million output tokens. deepseek-v4-pro — $0.435 per million input tokens (cache miss) or $0.003625 (cache hit), and $0.87 per million output tokens. Context caching delivers roughly a 50x discount on repeated input tokens. The legacy model names deepseek-chat and deepseek-reasoner now route to deepseek-v4-flash (non-thinking and thinking mode respectively).

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Frequently Asked Questions

What is DeepSeek?

DeepSeek's chat app is free; its OpenAI-compatible API is pay-per-token (DeepSeek-V4 from $0.14/M input, $0.28/M output) with thinking mode and a 1M-token context.

Is DeepSeek free?

DeepSeek offers a freemium model with both free and paid plans. Consumer chat app: free on web, iOS, and Android. API (pay-per-token, no subscription; charged against a topped-up balance): deepseek-v4-flash — $0.14 per million input tokens (cache miss) or $0.0028 (cache hit), and $0.28 per million output tokens. deepseek-v4-pro — $0.435 per million input tokens (cache miss) or $0.003625 (cache hit), and $0.87 per million output tokens. Context caching delivers roughly a 50x discount on repeated input tokens. The legacy model names deepseek-chat and deepseek-reasoner now route to deepseek-v4-flash (non-thinking and thinking mode respectively).

What can I use DeepSeek for?

DeepSeek is an AI-powered tool in the Research category. DeepSeek's chat app is free; its OpenAI-compatible API is pay-per-token (DeepSeek-V4 from $0.14/M input, $0.28/M output) with thinking mode and a 1M-token context.

What are the best DeepSeek alternatives?

You can find the best DeepSeek alternatives on our DeepSeek alternatives page. Nextool.ai lists hundreds of Research tools so you can compare features and pricing side by side.

How do I get started with DeepSeek?

To try DeepSeek, visit the DeepSeek website. DeepSeek offers a freemium model with both free and paid plans. Consumer chat app: free on web, iOS, and Android. API (pay-per-token, no subscription; charged against a topped-up balance): deepseek-v4-flash — $0.14 per million input tokens (cache miss) or $0.0028 (cache hit), and $0.28 per million output tokens. deepseek-v4-pro — $0.435 per million input tokens (cache miss) or $0.003625 (cache hit), and $0.87 per million output tokens. Context caching delivers roughly a 50x discount on repeated input tokens. The legacy model names deepseek-chat and deepseek-reasoner now route to deepseek-v4-flash (non-thinking and thinking mode respectively). You can also explore alternative Research tools on Nextool.ai to compare options before committing.

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