# Liquid AI: d1

> Liquid AI's first decision model, served only through the Liquid API. Returns Choice, Score and Noul answers with probability distributions and zero output tokens, on the /v1/systemone request shape used by TypeSafe's SDK.

- Page: https://systemonemodels.tech/liquid-ai/d1
- API: https://api.systemonemodels.tech/v1/models/liquid-ai/d1

## Facts

| | |
|---|---|
| Maker | Liquid AI (https://systemonemodels.tech/liquid-ai) |
| Decides | choice, score, noul, classify, route |
| Architecture | d1 |
| Licence | proprietary |
| Availability | Hosted API |
| Released | 2026-09-29 |
| Latest version | 2026.09 |

## Hosted API

- Provider: Liquid AI (https://docs.liquid.ai/lfm/models/decision-models)
- Docs: https://docs.liquid.ai/guides/decision-model-guide
- Input: — · Output: —

## Model card

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# d1

Liquid AI's first decision model, served only through the Liquid API. Returns Choice, Score and Noul answers with probability distributions and zero output tokens, on the /v1/systemone request shape used by TypeSafe's SDK.

Endpoint https://api.liquid.ai/decisions/v1/systemone with the model id d1:free; Liquid's migration guide recommends the typesafe-sdk client. Liquid's model library lists d1 as API-only, with no downloadable weights and no fine-tuning. Liquid has not published paid pricing, parameter count, context length or benchmark numbers on its own pages; a Decision Index figure circulating in the press is not on them, so it is not used here. Docs published 29 September 2026.

## What it decides

- **choice** — picks one option from a set
- **score** — places the input on an ordered scale
- **noul** — answers a yes/no question with one calibrated probability
- **classify** — assigns a category from a fixed taxonomy
- **route** — sends the input to one of several destinations

## At a glance

| | |
|---|---|
| Maker | Liquid AI |
| Released | 2026-09-29 |
| License | proprietary |

## Hosted API

Served by **Liquid AI**. [Get access](https://docs.liquid.ai/lfm/models/decision-models) · [API docs](https://docs.liquid.ai/guides/decision-model-guide).

## Read more

- [Decision models docs](https://docs.liquid.ai/lfm/models/decision-models)
- [Migration guide](https://docs.liquid.ai/guides/decision-model-guide)
- [Demo (road-decider)](https://github.com/Liquid4All/cookbook/tree/main/examples/road-decider)

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*This page was opened by System One for Liquid AI, who can claim the organisation and take it over at any time.*

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From System One Models — https://systemonemodels.tech/ · every System One model: https://systemonemodels.tech/system-one-models