Sesame CSM
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A to Z
- A · App
- No
- B · Built By
- Sesame AI
- C · CEO & Politics
- Brendan Iribe — No public partisan activity documented
- D · Date
- 2025
- E · Expertise
- Intermediate+
- F · Free Tier
- Yes
- G · Generates
- Text only
- H · Deployment
- Local (open weights)
- I · Inputs
- Text
- J · Jurisdiction
- USA
- K · Key Staffers
- Ankit Kumar (Co-founder), Nate Mitchell (Chief Product Officer), Hans Hartmann (COO)
- L · Languages
- English-primary
- M · Model Type
- Voice / TTS
- N · Safety Issues
- Voice cloning misuse potential.
- O · Open Source
- Yes — open weights
- P · Pricing
- Free (open weights, Apache 2.0)
- Q · AIDb Rating
- 4/10 · AIDb v2.0 (rule-based): Capability 4/10 · Currency 4/10 · Access 5/10 · Significance 4.5/10 → 4.22
- R · What Makes It Special
- CSM (Conversational Speech Model), Sesame's speech generation model that produces RVQ audio codes from text and audio inputs, pairing a Llama backbone with a smaller audio decoder that outputs Mimi audio codes; a fine-tuned version powers Sesame's interactive voice demo. The open 1B base model is not tuned to any particular voice, cannot generate text and handles languages other than English poorly. It is released under Apache 2.0, and Sesame forbids impersonation, deception and other misuse.
- S · Stock / Status
- Private
- T · Training Cutoff
- [UNKNOWN]
- U · Users
- [UNKNOWN]
- V · Voice Chat
- No
- W · Weights
- Downloadable
- X · X Handle
- @sesameai_
- Y · Year Founded
- [UNKNOWN]
- Z · Bottom Line
- Open-weights Voice / TTS from Sesame AI, released 2025.
Data completeness 88% · Last verified 2026-06-11 · Primary source ↗
Cite this
“Sesame CSM.” AIDb — The AI Database. Verified 2026-06-11. https://theaidatabase.com/m/sesame-csm.html