Does DeepSeek Remember Previous Conversations?

Not across separate chats, as far as its own documentation shows. DeepSeek saves your chat history, so you can reopen an old conversation and continue it, but its official consumer documentation does not describe any feature that carries what you said in one chat into a different, new chat. There is no documented basis for expecting a new conversation to know what the others contained. If you want continuity, bring it yourself — the last section shows how.

Every vendor fact below was checked against DeepSeek's own pages on 2026-09-17. "Not documented" is a statement about those pages, not proof that a feature can never exist; it means there is no verified basis for expecting a new chat to know what an old one contained.

Saved history is not cross-chat memory

Two distinct questions easily get mixed up here.

Does DeepSeek keep my conversations? Yes. The DeepSeek privacy policy lists your prompts, uploaded files, and chat history among the information it collects, and says you can copy or delete your chat history through your settings. Inside one conversation, DeepSeek reads the earlier messages in that same thread, which is why it can follow up on what you said five minutes ago.

Does a new chat know what an old chat said? That is what people usually mean by "memory," and it is a separate feature that a product has to build. DeepSeek's user guide and its chat troubleshooting section contain no memory switch, no list of saved facts, and no instructions for making DeepSeek remember something across conversations. A stored transcript answers the first question. It does not answer the second.

What the API documentation says, and what it does not

Developers get an explicit statement. DeepSeek's multi-round conversation guide says the /chat/completions API is stateless: the server does not record the context of earlier requests, so the caller has to send the full conversation history with every request.

That is a fact about one API endpoint. It explains why apps built on DeepSeek's models only "remember" what the app itself stores and resends. It is not, by itself, a description of the consumer website or mobile app, which do keep your history.

How to delete a conversation

According to DeepSeek's Deleting Chats guide:

On the web

1. Find the conversation in your chat history.
2. Click … next to it, then choose Delete.

In the app

1. Open your chat history.
2. Long-press the conversation and choose Delete.

The guide cautions that deleted chats cannot be recovered, so copy out anything you still need beforehand.

Does deleting a chat make DeepSeek forget it?

Deleting removes the conversation from your history. Because no separate memory store is documented, there is no second place to clear out the way there is with assistants that keep saved memories.

Clearing a chat from your history is not the same as instant erasure everywhere. The privacy policy describes keeping information for as long as needed to provide the service and for security and legal purposes. Treat deletion as removing the chat from your account, not as a guarantee about every copy.

Temporary chats, memory settings, and paid plans

The consumer user guide documents none of these: no temporary or incognito chat mode, no memory switch, and no paid tier that adds memory. There is nothing to turn on, turn off, or pay for.

A private browser window is not a substitute. It changes what your browser stores on your device; it does not change what a service you are logged into keeps on its servers.

Why DeepSeek forgets things within one long chat

Even inside a single conversation, a model can only work with a limited window of recent text. When a thread grows long enough, the oldest messages fall outside that window, and DeepSeek may contradict or lose track of something you established early on — even though the full transcript is still on your screen. Starting a fresh chat with a short summary usually works better than pushing a very long thread further.

How to carry your own context into a new chat

Keep a short note outside the conversation and paste the relevant part at the top of your next request. A useful note covers:

• the task and where it stands;
• decisions already made, and constraints that still apply;
• any source text the answer relies on;
• what has changed since last time.

For example: "We chose the shorter outline. Keep the examples, drop the pricing section, and revise the introduction below." A prompt written this way works in any chat, on any assistant, because it does not rely on memory you cannot see.

FAQ

Does DeepSeek remember previous conversations? It saves them in your history and reads earlier messages within the same conversation. Its official documentation describes no feature that carries information from one conversation into another.

Can I make DeepSeek remember something permanently? There is no documented setting for it. Keep the details in your own note and paste them in when needed.

Does DeepSeek have an incognito or temporary chat? The official user guide does not document one.

Can I recover a deleted DeepSeek chat? No. The Deleting Chats guide says deleted chats cannot be recovered.