# Liquid d1

> Liquid d1 is Liquid AI's first decision model: send application state and typed questions (noul / choice / score) and get calibrated probabilities back in a single call with zero generated tokens — not chat text. Built for classification, routing, scoring, moderation and guardrails. Call POST /api/v1/decisions (POST /api/v1/systemone is the same handler).

**ID**: `liquid/d1`  
**Creator**: liquid  
**Category**: text  
**Context**: 32K tokens  
**Input**: $0  
**Output**: $0  
**Released**: 2026-09-29  
**Web page**: https://anyrouter.dev/model/liquid/d1

**Input modalities**: text  
**Output modalities**: text  

**Capabilities**: systemone

**Supported parameters**: state, model, questions

**Aliases**: `liquid/d1:free`

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/decisions`

```bash
curl https://anyrouter.dev/api/v1/decisions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "state": "Help! My payouts have been failing for 3 days.",
  "model": "liquid/d1",
  "questions": {
    "is_urgent": {
      "type": "noul",
      "instructions": "Does this convey urgency?"
    }
  }
}'
```

Decisions is not chat: send `state` and typed `questions` (noul / choice / score). Requires a BYOK key for TypeSafe, LLM Gateway, Vercel AI Gateway, AIHubMix, AutoJev, or Fastino.

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| liquid-byok | $0 | $0 |

## Source

- Upstream docs: https://docs.liquid.ai/lfm/models/decision-models