Computer use models and infrastructure. One API.

Northstar is a vision-language model for computer use. Lightcone is the platform to deploy it — cloud, VPC, on-prem, or fully self-hosted.

Get started

Makes any task with precision.

Try it yourself

$ pip install tzafon

from tzafon import Lightcone

client = Lightcone()

Models

Models, APIs, and infrastructure. One computer-use stack. Purpose-built vision-language models, four API layers from high-level to raw control, and managed execution environments. All in one platform.

Northstar CUA Fast

4B-parameter vision-language model trained with GUI reinforcement learning. Sees screenshots, understands context, executes actions. Competitive with models 8x its size. Apache 2.0

HuggingFace GitHub Research

Custom Models

Fine-tuned on your internal tools, workflows, and UI patterns. Dedicated training runs on your data.

Self-Hosted

Run open-weight models on your own infrastructure. Full audit, air-gapped deployment, complete data sovereignty.

View on HuggingFace