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Sesame
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Updated 1 Oct 2026
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Price
Free
About Sesame
Sesame is an AI voice companion focused on natural, expressive conversational interactions.
Sesame key features
**Conversational voice companion** — natural-sounding speech with breathing, pauses, and filler.
**Two characters: Maya & Miles** — distinct personalities tuned for warmth and casual chat.
**Real-time streaming** — sub-second latency for back-and-forth conversation.
**Open weights (CSM-1B)** — base voice model released for research and commercial use.
**Companion glasses roadmap** — wearable device designed around the voice experience.
Sesame use cases
Building voice-first prototypes for accessibility and ambient computing.
Demonstrating expressive TTS in research and academic contexts.
Fine-tuning the open CSM model for branded character voices.
Exploring conversational interfaces for support and coaching apps.
Useful for
Product teams researching voice UX for assistants and companions.
Developers who want an open-weight TTS baseline they can fine-tune.
Anyone testing what natural voice AI feels like beyond robotic TTS.
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Frequently asked questions
What is Sesame useful for?
Product teams researching voice UX for assistants and companions.
Developers who want an open-weight TTS baseline they can fine-tune.
Anyone testing what natural voice AI feels like beyond robotic TTS.
What are the main use cases for Sesame?
Building voice-first prototypes for accessibility and ambient computing.
Demonstrating expressive TTS in research and academic contexts.
Fine-tuning the open CSM model for branded character voices.
Exploring conversational interfaces for support and coaching apps.
What are Sesame's key features?
Conversational voice companion
— natural-sounding speech with breathing, pauses, and filler.
Two characters: Maya & Miles
— distinct personalities tuned for warmth and casual chat.
Real-time streaming
— sub-second latency for back-and-forth conversation.
Open weights (CSM-1B)
— base voice model released for research and commercial use.
Companion glasses roadmap
— wearable device designed around the voice experience.
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