Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use.
Its capabilities exceed those of any model we’ve ever made generally available.
Meet $ONFABLE: an open-source AI agent that lives in your terminal.
CA: 0x92694314A4CCe3FFb3d2f7794c93E2898C322Ba3
It runs commands, edits files, browses the web, and remembers you. Any model-Claude Fable 5, OpenAI, OpenRouter, local.
Every fable is a story with a lesson.
onfable is where your machine starts writing its own.
An open-source AI agent that lives in your terminal, it runs commands, edits files, browses the web, and remembers you.
Full system access, with guardrails:
Every shell command and file write asks for your approval first. You see exactly what it wants to run.
Trust a workflow? --yolo and let it cook
Every fable is a story with a lesson.
onfable is where your machine starts writing its own.
An open-source AI agent that lives in your terminal, it runs commands, edits files, browses the web, and remembers you.
Bring any model:
• Claude — up to Fable 5, the strongest model there is (and yes, the name is fate ✳)
• OpenAI
• OpenRouter
• any OpenAI-compatible endpoint, incl. local (Ollama, LM Studio)
Your API key. Your machine. Nothing passes through our servers.