Versions and weights

Pin a version; each call counts with its version's weight.

Sign in to see your own test client ID in the samples.

Every call is answered by one published ATON Kestrel version. Pin it with the Kestrel-Version header (or ?version=); without one you get the newest. Versions read like the sites' own: ATON Kestrel ALPHA v0.1.0, then BETA, then no label at full launch.

Weights

A call counts with its version's weight, like the per-model prices of other AI APIs:

• every older published version counts 1x;
• the newest major version counts up to 1.5x, set by a founder when it is published;
• a patch update never changes the weight.

When a new major version is published, the previous one falls to 1x by itself. The weights now are on the Kestrel API page and at GET /api/kestrel/v1/versions.

What changes between versions

Patch versions retrain on new data with the same inputs and ride along inside the version you pinned. Minor versions add indicators or strategies; major versions are a new model design. We tell you before a minor or major version is published, and the last three minor versions stay available, with 90 days' notice before one retires.