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๐Ÿค– Models

The Muse API offers access to models in different languages, with different capabilities to best fit your needs. Increasingly powerful models incur increased costs and slower calls, but they can tackle more tasks.

You can select which model to use by setting the X-Model header in your API call. Models code are formatted as model_class-language (orion-fr is the Orion model for French for instance).

Models can be further specialized by using ๐Ÿคน Skills.

Model classes & capabilities#

We offer three classes of models, with increasing capabilities. All models support all API endpoints, however skills are models specific.

ClassDescriptionTrained on...Best for...
aurigaOur smallest and simplest models. Available across many languages, suitable for simple straightforward tasks.filtered webSimple classification with Select, basic text generation.
orionA great tradeoff between power and cost. Can be specialized with skills to perform specific tasks at lyra level.curated dataMost text generation & classification use cases.
lyraOur most powerful and capable models.curated dataZero/few-shot complex tasks, specialized text generation.
๐Ÿ’ก Choosing the right class

We recommend starting your experiments with the most powerful model available, and then optimize for the smallest size that still fullfills your needs. If a skill matching your task is available, it can be used to allow smaller models to perform on-par with larger ones.

Languages & model availability#

โœ… are available in the API, ๐Ÿ“† are coming soon, and โŒ are not available.

French [fr]English [en]Spanish [es]Italian [it]

Don't see a language or model you need? Shoot us an e-mail at

Models versioning#

๐ŸŸข are recommended models, ๐Ÿ”ต are new models, ๐ŸŸก are models in end-of-life, and ๐Ÿ“† are coming soon.

ModelTraining dataData cut-offStatus
orion-frfr-web-v1December 2018๐ŸŸก
orion-fr-v2fr-curated-v1October 2021๐Ÿ”ต
lyra-frfr-curated-v1October 2021๐Ÿ“†
orion-enen-curated-v1December 2020๐ŸŸข
lyra-enen-curated-v1December 2020๐ŸŸข

We recommend you make the switch from ๐ŸŸก end-of-life models to ๐Ÿ”ต new models as soon as possible.