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Parameter descriptions:

Base Model Data
Are datasources for training the base model comprehensively documented and freely made available? In case a distinction between base (foundation) and end (user) model is not applicable, this mirrors the end model data entries.
End User Model Data
Are datasources for training the model that the enduser interacts with comprehensively documented and freely made available?
Base Model Weights
Are the weights of the base models made freely available? In case a distinction between base (foundation) and end (user) model is not applicable, this mirrors the end model data entries.
End User Model Weights
Are the weights of the model that the enduser interacts with made freely available?
Training Code
Is the source code of datasource processing, model training and tuining comprehensively and freely made available?
Code Documentation
Is the source code of datasource processing, model training and tuning comprehensively documented?
Hardware Architecture
Is the hardware architecture used for datasource processing and model training comprehensively documented?
Preprint
Are archived preprint(s) are available that detail all major parts of the system including datasource processing, model training and tuning steps?
Paper
Are peer-reviewed scientific publications available that detail all major parts of the system including datasource processing, model training and tuning steps?
Modelcard
Is a model card in standardized format available that provides comprehensive insight on model architecture, training, fine-tuning, and evaluation are available?
Datasheet
Is a datasheet as defined in "Datasheets for Datasets" (Gebru et al. 2021) available?
Package
Is a packaged release of the model available on a software repository (e.g. a Python Package Index, Homebrew)?
API and Meta Prompts
Is an API available that provides unrestricted access to the model (other than security and CDN restrictions)? If applicable, this entry also collects information on the use and availability of meta prompts.
Licenses
Is the project fully covered by Open Source Initiative (OSI)-approved licenses, including all data sources and training pipeline code?

Conversational Speech Model

by Sesame AI

Model which seeks to produce speech with realistic elements.
Audio
Full
https://www.sesame.com/research/crossing_the_uncanny_valley_of_voice
CSM-8B
CSM-8B
Apache-2.0
Company seeking to make computers more life-like.
https://www.sesame.com
April 2025
Availability
Training Code
Repository exists, however contains no training code.
https://github.com/SesameAILabs/csm
Base Model Data
Data source listed as 'a large dataset of publicly available audio'. No links provided.
https://www.sesame.com/research/crossing_the_uncanny_valley_of_voice
End User Model Data
Data source listed as 'a large dataset of publicly available audio'. No links provided.
https://www.sesame.com/research/crossing_the_uncanny_valley_of_voice
Base Model Weights
Weights of a smaller variant of the model released.
https://huggingface.co/sesame/csm-1b
End User Model Weights
Weights of a smaller variant of the model released.
https://huggingface.co/sesame/csm-1b
Documentation
Code Documentation
No training code, so no documentation.
Hardware Architecture
No hardware architecture information found.
Preprint
Model only publicized through blog post.
https://www.sesame.com/research/crossing_the_uncanny_valley_of_voice
Paper
No paper found.
Modelcard
Model card only provides information about usage.
https://huggingface.co/sesame/csm-1b
Datasheet
No datasheet found.
Access
Package
No package found.
API and Meta Prompts
Smaller version of the model available through a HuggingFace space. Full version of the model available through a site demo.
https://huggingface.co/spaces/sesame/csm-1b
Licenses
Model available under Apache-2.0, an OSI-approved license.
https://www.sesame.com/research/crossing_the_uncanny_valley_of_voice
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Supported by the Centre for Language Studies and the Dutch Research Council. Website design & development © 2024 by BSTN. This version of the index generated 09 Apr 2025, website content last updated 23 Apr 2025.