fleming-1

Model

Sierra model that analyzes callers' speech in real time to detect likely AI-generated voices.

Released: Oct 8, 2026
Context window: —
Modality: audio
Open source: —
API available: —
Releases: 1

Releases

Oct 8, 2026Sierra launches fleming-1 synthetic-caller detectorfleming-1Model release

Sierra launched fleming-1, a real-time audio model that scores callers' speech for signs it was generated by AI and can be enabled on Sierra voice agents.

Sierra Model releaseSierra fleming-1