Models

layahost serves two checkpoints of Laya, an English one and a multilingual one, plus laya-auto, which picks between them for each request.

Laya is an open-source typed-decision model by Convai Innovations, released under the Apache-2.0 licence. layahost hosts it as an unofficial service and is not affiliated with Convai Innovations or TypeSafe AI.

Available models

Model	Description
`laya-auto`	The default for `/v1/decide`. Sends each request to `laya-english` or `laya-multilingual` based on the language of the text.
`laya-english`	The English checkpoint, built on ModernBERT-large. For English text.
`laya-multilingual`	The multilingual checkpoint, built on mmBERT-base. For text in other languages or mixed languages, and the faster of the two.
`jev-latest`	An alias of `laya-auto`, so Jev clients and the SDKs' default model work unchanged. Any other `jev-*` name is accepted the same way.

All models cost the same: $0.000005 per decision.

How laya-auto routes

laya-auto detects the language of the text. Only text detected as English goes to laya-english. Everything else, including text whose language is unclear, goes to laya-multilingual, which copes better with mixed and non-English input.

The response tells you which checkpoint answered: model is laya-english or laya-multilingual, never laya-auto. On /v1/systemone, meta.checkpoint says the same.

If you already know the language, pass lang (for example "lang": "de") to skip detection. en selects the English checkpoint, any other code the multilingual one. lang has no effect when you name a checkpoint directly.

Choosing a model

Start with laya-auto. It suits most traffic, including a mix of languages.
Pin laya-english if all your text is English and you want every request answered by the same checkpoint.
Pin laya-multilingual for non-English text, or when speed matters more than the last bit of accuracy on English.

The two checkpoints are different models and return different probabilities for the same input. If you compare probabilities with thresholds, tune them per checkpoint, or pin one model.

The language template does not use Laya: it runs a dedicated language detector and reports model as lingua. See Language detection.

List models

GET /v1/models returns the models you can use, in the Jev format. The SDKs expose it as client.models.list().

GET /v1/models

curl https://layahost.com/v1/models \
  -H "Authorization: Bearer $LAYAHOST_API_KEY"

Response · 200

{
  "models": [
    {
      "name": "laya-auto",
      "description": "Routes each request to the best Laya checkpoint for its language.",
      "release_date": "2026-09-18"
    },
    {
      "name": "laya-english",
      "description": "Laya English checkpoint (ModernBERT-large), best accuracy on English text.",
      "release_date": "2026-09-18"
    },
    {
      "name": "laya-multilingual",
      "description": "Laya multilingual checkpoint (mmBERT-base), 100+ languages, fastest.",
      "release_date": "2026-09-18"
    },
    {
      "name": "jev-latest",
      "description": "Alias of laya-auto for drop-in Jev compatibility.",
      "release_date": "2026-09-18"
    }
  ]
}

Listing models is free and counts towards your rate limit.