The models behind
the possibilities.
Three commercial model families: Z1 for general-purpose intelligence, Z1 Code for coding, and H1 for higher-capability reasoning. One connected Tessen environment.
A family of models.
For the work ahead.
Distinct capabilities, brought together by HERO—the intelligent AUTO orchestration experience. Model access depends on the services and releases enabled for your account.

Z1
A general-purpose model family for language, reasoning and digital work.
Confirm current access through Platform
Z1 Code
Coding intelligence for development, from understanding a repository to working through a change.
Confirm current access through Platform
H1
Higher-capability intelligence for complex reasoning and organizational work.
Confirm current access through PlatformZ1 · Z1 Code · H1. Availability and entitlements are confirmed through Platform. Artwork expresses the model families conceptually.
The model is
part of the story.
Models, experiences and agents have different roles. Tessen brings the relevant pieces together around the work you authorize.
- HERO
- The intelligent AUTO experience that orchestrates capabilities. HERO is not a model family.
- ZERO Alpha
- A promotional developer program. Activation and coding intelligence are subject to access and capacity.
- NODE
- Local/private/distributed compute, supporting only models a user is permitted to run.
One architecture.
Different responsibilities.
Z1, Z1 Code and H1 form the commercial model portfolio. HERO orchestrates the experience. ZERO Alpha is the promotional developer program. ZERO Coder remains a separate research initiative.
No implied
weight access.
Proprietary model access is API-only under authorization. NODE supports only models a user is permitted to run. No benchmark results, model weights or release licenses are published on this page.
Developer access