Deprecation Notices | Smallest AI Docs

This page lists Models (Waves) surfaces that are deprecated. Each row shows the current status and the migration target.

How to read this page

Deprecated: the surface still works, but new integrations should use the migration target. Deprecated model tags emit a warning frame with code: "model_deprecated" on connect.
Rejects: the surface returns an error and does not process the request. Migrate immediately.
Removed: the surface no longer exists. Requests return 404.

Currently deprecated

Speech-to-Speech (Hydra)

Surface	Deprecated since	Status	Migrate to
`?model=hydra` on `wss://api.smallest.ai/waves/v1/s2s`	2026-08-20	Deprecated. Session still opens, but the server emits a `warning` frame with `code: "model_deprecated"` immediately before `session.created`.	`?model=hydra-v1.1` (current release). See the Hydra model card for the current voice roster.

Reporting a break

If a surface you rely on starts emitting a deprecation warning unexpectedly, or a mapping on this page looks wrong, open a ticket and quote the surface plus the exact server frame you received. That is the minimum needed to trace and reroute.