# Local browser recognition models

Checked 4 November 2026. Runtime `vosk-browser` 0.0.8 is pinned to upstream source revision `adf09505c686e1be31dd3bcf1e1ab7604c27b4b9`. The German model is `vosk-model-small-de-0.15`; the English prototype uses `vosk-model-small-en-us-0.15` (both Apache-2.0). The unmodified upstream `vosk-browser.COPYING` and `vosk-browser.NOTICE` include Vosk, Kaldi, OpenFST, CLAPACK, clapack-wasm, zlib, libarchive, Emscripten and musl notices. The bundled uuid 9.0.0 MIT license is supplied separately. Model license files and the English archive's upstream README notice are retained.

Recognition identities are `de-DE` and `en-US`, independent of the UI language and its regional formatting. The Web call path now binds both speakers' languages to an explicit consent cycle and freezes the prepared model through capture and text finalization. English remains a gated prototype: its server flag defaults to disabled pending device acceptance. A synthetic English browser probe verifies local decoding and word timestamps; the complete browser probe checks the language-bound capture/finalization and text-only retry path. Neither establishes real conversation quality or native-device readiness. Native English integration remains pending.

The reproducible public-asset preparation script pins source URLs, sizes and SHA-256 digests and copies these notices beside the generated runtime/model. No downloaded code or package install scripts are executed. Model weights and generated runtime remain Git-ignored. All runtime/model downloads are from the application's own origin; speech processing runs locally, and no audio is uploaded to a model provider.

Primary sources: [pinned upstream COPYING](https://github.com/ccoreilly/vosk-browser/blob/adf09505c686e1be31dd3bcf1e1ab7604c27b4b9/COPYING), [pinned upstream NOTICE](https://github.com/ccoreilly/vosk-browser/blob/adf09505c686e1be31dd3bcf1e1ab7604c27b4b9/NOTICE), [uuid 9.0.0 license](https://github.com/uuidjs/uuid/blob/v9.0.0/LICENSE.md), [official model catalog](https://alphacephei.com/vosk/models).