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Free access to DeepSeek models on web, iOS and Android
- Web chat
- iOS and Android apps
- Thinking mode
- Web search
- File upload
DeepSeek
Editor reviewedFree AI chat app and low-cost API running DeepSeek's open-weights V4 models
Freemiumdeepseek.comUpdated
About DeepSeek
DeepSeek is an AI assistant and model provider from the Hangzhou-based company of the same name. Its chat service at chat.deepseek.com and its iOS and Android apps are free to use, and they run the company's current V4 model family. Developers can call the same models through a paid, pay-as-you-go API at platform.deepseek.com.
Best for
- Low-cost API integration
- Coding and math reasoning
- Self-hosting open-weights models
- Free everyday chat
- Coding backend for agents: Point Claude Code, Codex or OpenCode at the DeepSeek API as a low-cost model backend.
- Math and code reasoning: Use thinking mode for multi-step problems.
- Long document analysis: Feed large codebases or reports into the 1M-token context.
- Self-hosted inference: Download open weights from Hugging Face and run them on your own infrastructure.
- Everyday assistant: Use the free web chat or mobile app for questions and writing.
Not ideal for
- Image generation
- Users who cannot send data to servers in China
Popular with
- Software developers
- Researchers and analysts
- Students
- AI engineers
- Cost-conscious teams
Key features
- V4 model family
- Thinking mode
- Open weights
- OpenAI and Anthropic compatible API
- Tool calls and JSON output
- Search and Fetch APIs
- Agent tool integrations
- DeepSeek Harness
- Vision on Flash
Pros and cons
Pros
- Web chat and mobile apps are free
- API output costs from $0.60 per 1M tokens (Flash, off-peak), well below most frontier providers
- Open weights for V4 and earlier models on Hugging Face
- 1M-token context and 384K max output on both API models
- API works with both OpenAI and Anthropic SDKs and several coding agents
Cons
- Peak-hour API rates are double the off-peak rates on weekday mornings UTC
- deepseek-v4-pro does not support vision input
- No image generation
- Data is processed by a company based in China, which some organizations cannot accept
Pricing
Plans as listed by the vendor on . Check their site for current prices.
API: deepseek-flash
$0.15/1M input tokens
Pay as you go; $0.15 cache-miss input and $0.60 output per 1M tokens off-peak, double at peak
- 1M context
- 384K max output
- Vision
- Tool calls
- JSON output
API: deepseek-v4-pro
$0.66/1M input tokens
Pay as you go; $0.66 cache-miss input and $1.98 output per 1M tokens off-peak, double at peak
- 1M context
- 384K max output
- Tool calls
- JSON output
Our ratings
Scored out of 10 by the Finder Atlas editorial team.
8.8overall
- Reasoning & Logic
- 8.8
- Coding & Syntax
- 8.7
- Cost Efficiency
- 9.6
- Long Context
- 8.8
- Ease of Use
- 8.0
Platforms and integrations
Available on
- Web
- iOS
- Android
- macOS
- Windows
- API
Works with
- OpenAI SDK
- Anthropic SDK
- Claude Code
- Codex
- OpenCode
- Hugging Face
DeepSeek alternatives
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Release history
Released V4 Pro and Flash with open weights and a 1M-token context
Released V4 Pro and Flash with open weights and a 1M-token context.
Updated Flash model now served by deepseek-flash
Updated Flash model now served by deepseek-flash.
Reviews
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Frequently asked questions
Are DeepSeek models open source?
DeepSeek publishes open weights for its models, including V4, on Hugging Face, so they can be downloaded and run on your own hardware. The hosted chat and API are separate services run by DeepSeek.
Is DeepSeek free to use?
The web chat at chat.deepseek.com and the iOS and Android apps are free. The API is pay as you go, starting at $0.15 per 1M cache-miss input tokens for deepseek-flash off-peak.
What is the difference between peak and off-peak API pricing?
Off-peak rates are half of peak rates. Peak hours are 01:00-04:00 and 06:00-10:00 UTC on weekdays, excluding Chinese public holidays. All other times, including weekends, are off-peak.
Which models does the DeepSeek API offer?
Two: deepseek-flash, served by DeepSeek-V4.1-Flash-1017, and deepseek-v4-pro, served by DeepSeek-V4-Pro-0813. Both have a 1M-token context window and up to 384K output tokens. Older names such as deepseek-v4-flash are still accepted and routed to Flash.
Can I use DeepSeek with the OpenAI or Anthropic SDK?
Yes. Set the base URL to https://api.deepseek.com for the OpenAI format or https://api.deepseek.com/anthropic for the Anthropic format, and use a DeepSeek API key.
Does DeepSeek have a mobile app?
Yes. The official download page offers iOS and Android versions of the DeepSeek app, and a Harness desktop client for macOS and Windows.
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