Chatbots · 2 tools compared
Last verified:
Prices may changePracticing math and logic problem solving
DeepSeek ✓Free
You can use reasoning mode freely for free, as long as you do not enter personal data.
Sensitive data
ChatGPT ◐Free plan
Data storage locations and training opt-outs are clear. Better for company or school documents.
Just starting
ChatGPT ◐Free plan
Works right away without login, handling files, images, and voice in one tool.
When you need to host the model directly
DeepSeek ✓Free
Model weights are public, so you can run it on your own server or PC. No data leaves your machine.
| Item | DeepSeek | ChatGPT |
|---|---|---|
| Price | ✓Free | ◐Free plan |
| Free limits | Free on web and app. Slow responses when busy. The API is paid separately | Free plan available. Latest model has hourly usage limits, with caps on image generation and file uploads. |
| Paid price | None | Go ₩13,000/month · Plus ₩29,000/month · Pro from ₩159,000/month |
| Korean | ○KoreanKorean conversation works. Chinese and English sometimes slip in | ○KoreanKorean support for both UI and chat. Voice conversation also supports Korean. |
| Login | Required | Optional |
| Platforms | Web · iOS · Android | Web · iOS · Android · Windows · macOS |
| File input | PDF, IMAGE, TXT | PDF, IMAGE, DOCX, XLSX, CSV, TXT |
| Commercial use | ConditionalThe open weights are MIT licensed. Check the terms for the web service | AllowedUsers own the rights to outputs. Check terms. |
| Reasoning mode | Nearly unlimited for free (delays during high traffic) | Limited usage on free plan, generous on paid |
| Data storage | Servers in China. Restricted by some countries/institutions | Servers in the US. Option to turn off training usage |
| Open model | Open weights (can run locally) | Closed source (separate select open models available) |
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DeepSeek offers powerful reasoning models with almost no limits for free. It breaks down math and logic step-by-step. The key concern is data: web chats are stored on Chinese servers, and some institutions restrict it. Responses can lag when busy. If languages mix, ask it to reply only in Korean.
ChatGPT leads in features and stability. You can use it without logging in, handling files, images, voice, and code in one place. Clear data policies let you opt out of training. The free tier limits reasoning queries per hour, while the paid Plus plan offers generous limits.
The answer to whether you can use the free tier depends on what you input. For non-sensitive data like textbook math or public papers, DeepSeek is fine. For personal or company data, choose ChatGPT or run DeepSeek locally. If you need rich multimedia features, go with ChatGPT. Always verify the steps.
| Situation | Pick | Why |
|---|---|---|
| 🎒 Practicing math and logic problem solving | DeepSeek | You can use reasoning mode freely for free, as long as you do not enter personal data. |
| 🔒 Sensitive data | ChatGPT | Data storage locations and training opt-outs are clear. Better for company or school documents. |
| 🌱 Just starting | ChatGPT | Works right away without login, handling files, images, and voice in one tool. |
| 💼 When you need to host the model directly | DeepSeek | Model weights are public, so you can run it on your own server or PC. No data leaves your machine. |
Not a ranking. Different situations, different answers.
Last verified:
Prices may change; confirm on each official site before paying. A comparison's verified date is the oldest of the comparison and its tools.