The AI Dungeon Master
Play with AI.
For free. Forever.
4 of the 6 models Celeste can run cost nothing — and two of them never leave your computer at all.
What free means here
Not a trial. Not a credit. Free.
A new campaign starts on a local model. Nothing is sent anywhere, nothing is metered, and there is no card on file to forget about.
Qwen 3.6
FreeYour machine, through Ollama
The default. Nothing leaves your computer, and nothing is ever billed.
Gemma 4 · 12B
FreeYour machine, through Ollama
Three times lighter than Qwen and just as good at the table — our own bench put it ahead on tool use.
Gemma 4 · 31B
Free tierOllama cloud, on your account
A bigger model without a bigger machine. Served through the same Ollama you already run.
GLM 5.2
FreeOllama cloud, on your account
The heaviest of the free options, for tables that want more narration.
Two steps
Nothing to sign up for.
Install Ollama, pull a model, pick it in the campaign settings. Celeste talks to it on your own machine — the model is yours, the data is yours, and the bill does not exist.
Want a bigger brain without a bigger machine? The same Ollama serves two cloud models on your own free Ollama account — same two steps, nothing new to learn.
# 1 — install Ollama, then pull a model
ollama pull gemma4:12b
# 2 — in Celeste: Settings -> Model
# pick "Free - Gemma (local)"
# there is no step 3.
# no API key, no account, no invoice.And when you want the best
Bring your own Claude key.
Claude writes the richest Dungeon Master Celeste can give you. It runs on your API key — we never ship one, and we never see your calls. Set a daily ceiling in dollars and the engine checks it before it spends, not after.
And if your local model is down, Celeste tells you. It will not quietly reroute to a paid API and hand you the bill next month.
Keep reading
How the AI works→
The six models, the four actions it will never take alone, and the parts it is not allowed to invent.
Realms & Domains→
The kingdom game the AI was really built for: seasons, armies, trade, treachery.
Psionics→
What the tear in time left behind — and the child who woke a dead knight with it.