Most tool-calling frameworks quietly strip or reinterpret the channel structure
that open-weight reasoning models actually speak in, degrading the model. Abzu is built from the
ground up to properly utilize GPT-OSS's native tool calling channels, showing a marked
improvement in model quality.
ABZU gives you the power to write tools for your own agents using our improved model harness for GPT-OSS (20B or 120B).
This is a live, sandboxed demo, open by invitation. A llama.cpp instance running GPT-OSS will be provided.
Your session runs in an isolated environment, with a full simulated filesystem. Break it, rebuild it, push it as far as you want.
Your filesystem and history are saved between visits under your session.
Don't paste in credentials, personal data, or anything you wouldn't hand to a stranger's terminal.