Starting a new chat
1
Open the chat workspace
Navigate to the DeepMask workspace. Click New Chat in the left sidebar to open a fresh conversation.
2
Select a model
Use the model selector at the top of the chat input area to choose your starting model. A description and capability list appears for each model before you confirm.
3
Type your message
Enter your prompt in the input field and press Enter or click the send button to begin the conversation.
Switching models mid-conversation
You are never locked in to the model you started with. You can switch to a different model at any point in a conversation and the new model receives the full conversation history as context.1
Open the model selector
Click the model name displayed above the chat input field at any point during the conversation.
2
Choose a new model
Select any available model from the list. The switch takes effect on your next message.
Extended thinking
Some models support extended thinking, which gives the AI additional processing time to reason through complex problems before responding.1
Enable extended thinking
Click the Extended thinking toggle in the chat toolbar, below the message input field.
2
Send your prompt
Submit your message as normal. The model will show a thinking indicator while it works through the problem, then deliver a more thorough response.
Extended thinking is available on models that support it. The toggle is hidden automatically when the selected model does not support this capability.
Uploading files
You can upload documents and images directly into a chat for analysis, summarization, or reference.1
Attach a file
Click the attachment icon in the chat input area, or drag and drop a file into the chat window.
2
Add context
Type a prompt alongside the file to tell the model what you want — for example, “Summarize this document” or “What does this chart show?”
3
Send
Submit the message. The model processes the file and responds based on its contents.
Uploaded files are processed within EU infrastructure and are never used to train AI models.
Model capabilities
Each model in DeepMask lists the capabilities it supports. You can see these in the model selector before choosing.Web search
Query the web in real time and receive cited, up-to-date answers without leaving the conversation.
Documents
Upload and analyze PDFs, Word files, text files, and other document formats.
Image analysis
Send images and ask the model to describe, extract data from, or reason about visual content.
Data analyst
Upload spreadsheets and CSVs for AI-generated charts, insights, and summaries.
Reasoning
Deep, multi-step logical reasoning for complex research, coding, or analytical tasks.
Canvas
An interactive editing surface for drafting and refining long-form content collaboratively with the model.