Sesame CSM

Free

A 1B parameter open-source TTS model from Sesame.

Open-SourceRobustConversational

Overview

Sesame CSM (Conversational Speech Model) is a 1B parameter open-source model built for natural, context-aware voice interaction. It is designed to maintain consistent tone and prosody across turns of a conversation. The open release lets developers integrate lifelike voices into assistants and agents.

What makes Sesame CSM special?

Focus: Conversational speech modelling.
Availability: Free & Open-Source.
Use cases: Voice assistants, agents, and interactive applications.

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