Zytheris

Features you can defend.

Proven feature packs for a subject model. Preview the shelf catalog, or request a custom pack on a checkpoint you grant us — any size.

Get started Request a custom pack

Product

What you get

One product: named features with the tests attached. Shelf catalogs we already ran, or a custom pack on a checkpoint you grant us — any size.

Catalogs we train and test on public checkpoints. Only features that pass ship, with the report attached.

Same lab on a checkpoint you grant us — public, gated, or private. Any size; we provision GPUs. The pack lands in your team account.

Optional: run a shipped feature on your own prompt. That run is not the proof.

How it works

1

Open a workspace

Preview is free. The current shelf catalog appears when it is imported — named features with the tests attached.
2

Request a custom pack

Need another checkpoint? Grant a public ID, gated repo, or private access. Any size; we provision GPUs. No weight upload.
3

Ship with evidence

Only features that pass causal tests ship. If none do, the workspace still gets the report.

Who it's for

Hand a reviewer a feature and the tests that support it — not a chat product, and not a pile of unlabeled directions.

Safety reviews that need evidence, not a caption
Evals that need a measured before and after
Teams that want tested features on a model they can grant us — shelf or custom, any size

Pricing

Preview is free. Team is $149 USD per workspace / month. Custom packs are quoted.