ChatGPT vs DeepSeek

The short answer

ChatGPT and DeepSeek represent two different approaches to AI. ChatGPT, made by the American company OpenAI, is a closed, feature-rich assistant with free and paid plans. DeepSeek, made by a Chinese company based in Hangzhou, publishes the weights of its main models under the MIT license, offers a free chat app with no paid tiers, and sells very cheap API access. Choose ChatGPT for the most complete everyday assistant; choose DeepSeek if open weights, low cost or self-hosting matter most. Think carefully about privacy with DeepSeek's own service, because its data is stored in China.

ChatGPT vs DeepSeek at a glance

Quality for everyday tasks

For common jobs such as explaining a topic, writing a draft, summarizing a document or solving a math problem, both are capable. DeepSeek's models are particularly strong at step-by-step reasoning, math and code, and its thinking mode shows a clear chain of steps before the final answer. ChatGPT offers a more polished overall experience: well-structured answers, visual and interactive replies, image creation, voice conversations, memory and projects. If you only need text answers, the gap is smaller than the feature lists suggest. Try the same prompt in both and compare.

There are practical differences in daily use as well. ChatGPT's free plan has usage caps and a lighter model, with stronger models on paid plans. DeepSeek's chat app has no paid tier at all, so everyone gets the same models, but the service can be slow at busy times. ChatGPT also offers memory, custom instructions and app connections that make it feel more personal over time, while DeepSeek's app keeps things simple: chat, web search, file uploads and a thinking mode. If you want an assistant for photos, voice or creative images, ChatGPT is the clear choice; for plain text, math and code, DeepSeek holds its own.

Open weights and cost

This is DeepSeek's biggest advantage. Because the weights are public under MIT, anyone can download the models, run them on their own servers, fine-tune them and build commercial products without paying DeepSeek. Many cloud providers host DeepSeek models too. The catch is size: the full models need data-center hardware, so most individuals either use DeepSeek's own app and API or a hosted version. DeepSeek's API is also known for very low prices, which makes it popular for apps with heavy traffic.

ChatGPT's models cannot be downloaded. OpenAI does publish separate open-weight models called gpt-oss under Apache 2.0, but they are different from the models inside ChatGPT. If you are a developer weighing these options, our AI for coding guide and the code assistant tool are good starting points.

Privacy and censorship

Privacy is where the two differ most. DeepSeek's privacy policy says it collects, processes and stores personal data in the People's Republic of China, which means Chinese law applies to what you type into its app or API. It may use your data to train its models, and its policy lists a right to opt out. Several governments and organizations have restricted the official app on work devices. The official app also follows Chinese content rules, so it avoids or deflects some politically sensitive topics.

ChatGPT is run by a US company. On individual plans, OpenAI may use your chats for training unless you turn off "Improve the model for everyone" in Data controls, and temporary chats are not used for training. With either service, keep passwords, ID numbers, health information and confidential work data out of the chat. One practical middle path for businesses is to run DeepSeek's open weights on their own servers or with a trusted host in their region, so prompts never reach DeepSeek. Read our AI privacy and safety guide for more.

Choose ChatGPT if…

• You want the most complete assistant, with images, voice and interactive answers.
• You prefer your data handled by a US company with clear opt-out controls.
• You need polished apps on every platform and integrations with other tools.
• You ask about news, politics or history and want fewer topic restrictions.
• You do not need to host or modify the model yourself.

Choose DeepSeek if…

• You want a capable free chat app without a paid subscription.
• You need open weights to self-host, fine-tune or build a product.
• You are a developer who wants very low API costs.
• Your main tasks are math, logic or coding.
• You can keep sensitive data out of it, or run the weights on your own infrastructure.

FAQ

Is DeepSeek as good as ChatGPT?

For many text tasks, especially math and coding, DeepSeek is competitive. ChatGPT offers more features and a more polished experience. The best choice depends on your tasks and your privacy needs.

Is DeepSeek really free?

The official chat app and website are free. The API is paid per use, and the open weights are free to download, though running them costs money for hardware.

Is it safe to use DeepSeek?

Treat it like any public chatbot and be extra careful with personal or business data, because the official service stores data in China. Self-hosting the weights avoids sending data to DeepSeek.

Is ChatG related to ChatGPT or DeepSeek?

No. ChatG is an independent AI chat website and is not affiliated with OpenAI or DeepSeek. This page is an informational comparison. You can try ChatG free, and read our ChatGPT guide and DeepSeek guide for more.