Visualize, explore and learn in a new way, with OpenGhost.
OpenGhost
v1.4.7 beta
What's new:
- Local models: give the address of Ollama, LM Studio or llama.cpp running on your computer, and its models show up in the model picker; the size of a model's context is set by hand or by the app itself.
- Any OpenAI-compatible API, in a section of its own: the address of a service and its key.
- Every model your key can use: an Anthropic key lists all its models, an OpenAI key every chat model, and both take a model by its ID.
- The agent sees a task through: a result you can act on at once, with the exact items, prices, links and its own pick.
- The agent keeps its browser tabs in order and closes the ones it is done with.
- macOS: Google takes a new sign-in in the built-in browser.
Older versions are on the Releases page.
Try the app in your browser, with no install, on the website.
OpenGhost is an open desktop agent for Windows, macOS and Linux. It runs commands, edits files, keeps git and works on the web in a browser of its own. And it shows what it explains: charts, schemes, photos and videos stand next to the text.
An agent built for visualization
OpenGhost is an agent built for visualization. When something is better shown than told, the answer comes with a drawing beside it, and the whole app is made so that reading and working with documents feels comfortable. A new chat needs no folder: type, and it goes to Chats at the top of the list, with a folder of its own for the files the agent makes. A chat about a project still lives in that project's folder.
Written from scratch
Nothing in OpenGhost is assembled from ready parts. There is no UI framework inside, no Markdown library, no Mermaid, no chart library and no agent framework. Every part is our own code:
- The agent. The loop, the tools (commands, files, git, web search, pages, PDFs, video frames), the approval cards and the three permission modes.
- The drawing engine. It reads what a model writes, lays it out and draws it: 43 kinds of drawings, from flowcharts and loss curves to a day of meals and the route of a trip. A drawing is live: it answers the pointer and can be edited where it stands.
- The browser. The agent sees a page as text with numbered elements, moves its own cursor, clicks, types and reads, in a browser panel it shares with you.
- The text. The Markdown renderer that draws a reply while it is still being written, the code highlighter and the math.
- The interface. Every control, its motion and its glass, in plain JavaScript and CSS.
The app stands on two things only: Electron, which gives it a window, and Anthropic's official SDK, which talks to Claude.
It shows what it explains
Ask how something works, and the answer comes with drawings: the whole as a scheme, the curves the topic is known for as charts, the key numbers as tiles. The engine knows more than forty kinds of drawings, from a day of meals and the route of a trip to the heavy charts of physics and any other science. Here one series of games stands as a mindmap of its universes and as a ring of what each universe holds.
A scheme with the detail in it
A block carries its name and a line about what happens in it. Stages stand in groups, and a process that repeats closes into a ring.
Drawings made for the subject
Food, recipes, documents, matches, languages, PC builds, device settings and trips have drawings of their own. A day of meals is a ring of calories with protein, fat and carbs against the goal.
A trip is a route with its legs, and words to learn come with their sound and an example.
Change the drawing where it stands
A drawing is not a finished picture. Open it and change the layout, the blocks and the arrows in a table, or edit its source. The drawing follows as you type.
Photos and videos in the reply
When a thing is better seen than described, a dish, a place, a game, the agent looks for pictures and videos itself. Pictures stand in a stack to leaf through, each with the page it came from. A video is a card with its preview, name and length, and a click opens it in your browser.
A browser with its own cursor
OpenGhost has a built-in browser and drives it itself. It opens a page, moves its own cursor, clicks, types, and sees what is on the screen. The panel sits on the right of the chat. Close it and the agent still works.
It works in your accounts
The browser panel is signed in where you are, so the agent works inside your own accounts and not only on open pages. A custom MCP server of ours gives it the control it needs over the sites it drives. One request can cover a whole round: open my Reddit account, tell me the view counts of my three most recent posts, then go through the comments and pull out the ones that matter, both the suggestions and the bugs people ran into.
Notes it keeps an eye on
Ask the agent to write a note down, or write one yourself, for example "Add to my notes: check my DMs on X today". The notes stay in the list beside the chat, the agent reads them and keeps them in mind, and when a conversation arrives at what a note is about, the agent brings it up by itself and asks whether to deal with it now. It never acts on a note on its own.
It remembers you
Tell OpenGhost about yourself once, in any chat, and every chat knows it: who you are, what you work with, how you like answers. It keeps short records, changes a record when the thing changes instead of writing a second one, and never keeps passwords or the details of one task. Everything it remembers is on one page of the settings, where you can rewrite a record, remove it, add your own, or switch the memory off.
A project can have its own instructions too: put an AGENTS.md in its folder, and the agent working there follows it.
Find a chat
The magnifier, or Ctrl+K, opens a search in the middle of the chat. Type, and the chats it finds come out under it, each under its folder.
Quick chat, from anywhere
Press Alt+Space, or the combination you set in Settings, and a small chat comes up over whatever is on screen: first its message field, then the rest. It is a full agent, called from anywhere: ask, read the answer, press Esc. It picks its own model and effort, searches the web, and keeps its chats in the list with a bolt; the arrows in its head open the chat in the app. Give its agent a task and close it, and the agent goes on with the app out of the way: the chat is marked when the answer is there, and you never had to open OpenGhost. With nothing to do, a closed quick chat sleeps.
Mini chat, with an agent of its own
Open Mini chat over the conversation and ask the second question you have in mind. It floats: drag it by its head, pull the arc in its corner to resize it, and keep writing in the chat behind it. The agent inside is a full agent that sees the history of the main chat, and it works in parallel with the agent of the chat, in its own browser tab: the two coordinate and never get in each other's way, they only add to each other. Close a mini chat at work and its agent goes on by itself and finishes the task.
What a chat costs
Chat stats, in the plus menu, show what a chat has spent: the tokens of every reply, the share of each model, how much of it came from the cache and how full the context is. Compact chat, next to it, frees the context of a long conversation, and the app does the same by itself before the model's window fills.
Show it a photo, a video, a PDF
Photos, videos and files attach from the plus menu or by a drop. A video comes in like a photo, and the agent watches it frame by frame. A PDF is read as text, and its pages with photos, charts, formulas or scans are looked at as pictures.
Tell it once, for every chat
The app itself speaks English, Italian, French and Russian, and you choose the language in Settings, under General. There too you write how to answer and what to know about you, and add the files OpenGhost should always have at hand: notes, a style guide, a CV. Every chat gets them, and a long chat keeps them after it is compacted.
The memory is the other side of the same page: everything OpenGhost has remembered about you is there to read and to change, to add to or to remove, or to switch off.
Make it yours
Light, dark, or the system's theme; the size of the interface; and, new in 1.4.5, the colour of your own messages and of the chat's background, each theme keeping its own. Nothing is picked for you: until you choose, the themes look as they always did.
![The Appearance page of the settings: themes, message colours and chat backgrounds](images/appearance.j