Overview
DeepSeek offers a free AI chat assistant on the web at chat.deepseek.com and in iOS and Android apps, powered by its own models (currently the V4 family). The app supports web search, a Deep-Think reasoning mode, and file uploads with text extraction. Developers can use the same models through a pay-per-token API.
Label: Vendor-described — Captured from the vendor's own materials. Not independently verified.
Best for
- Low-cost general AI chat and reasoning for everyday tasks
- Developers wanting an inexpensive LLM API or open-source models
Key features
- Free web chat with deep thinking (reasoning) mode
- Smart web search inside chat
- Open-source models including DeepSeek-V4 and R1
- Developer API platform with web search and page-fetch support
- Mobile app and a desktop app (Harness)
What it does
- Chat on web and mobile apps
- Web search
- Deep-Think reasoning mode
- File upload and text extraction
- Pay-per-token developer API
Use cases
Not mapped to a use case yet.
Drawbacks & cautions
- No team or business plan for the chat app was found
- API prices are higher during peak hours
- The free-app details come from a January 2025 announcement and may have changed
What users say
Across a small set of G2 reviews and Hacker News comments, users like DeepSeek's speed, low or free cost and visible reasoning. Common worries are uneven accuracy, content filtering and data privacy, plus missing image and voice features.
What people like
- Fast, simple interface that gives accurate answers for many everyday tasks g2.com
- Very low cost, with free chat access and cheap API pricing g2.com, hn.algolia.com
- Shows its reasoning steps, which users find useful for following and checking answers hn.algolia.com
Common complaints
- Accuracy and context handling are inconsistent, so answers may need checking g2.com, hn.algolia.com
- Censorship on some topics and privacy concerns about data stored in China g2.com, hn.algolia.com
- Lacks image/video generation and voice features found in rival assistants g2.com, hn.algolia.com
Scores are shown as each site published them on the date checked. They come from those sites' reviewers, not from us, and they never affect our rankings. Ratings based on fewer than 10 reviews are left out. The summaries are our own words, gathered Oct 22, 2026; follow the links to read the reviews.
Alternatives
- ChatGPT — General-purpose AI chat assistant for writing, research, analysis, images and coding
- Claude — AI assistant for writing, analysis, research and coding, with Claude Code included on paid plans
- Google Gemini — Google's AI assistant for chat, research, images and video, built into Google apps
- Perplexity — AI answer engine that searches the web and returns cited answers and research reports
Evidence
| Fact | Label | Source | Observed |
|---|---|---|---|
| api | Vendor-described | api-docs.deepseek.com | Oct 17, 2026 |
| overview | Vendor-described | www.deepseek.com | Oct 17, 2026 |
| pricing | Vendor-described | api-docs.deepseek.com | Oct 17, 2026 |
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