# Drex v2.0

> Drex v2.0 is a 35B mixture-of-experts decision model (3B active) from Nace AI, the larger successor to Drex v1.5. Send application state (text or JSON) and typed questions (noul / choice / score) and get back a calibrated probability for every answer option in a single forward pass, with no text generation. It is TypeSafe System One compatible and suits routing, classification and policy checks that need a scored answer instead of prose. Call POST /api/v1/decisions (POST /api/v1/systemone is the same handler).

**ID**: `nace-ai/drex-v2.0`  
**Creator**: nace-ai  
**Category**: text  
**Context**: 8K tokens  
**Input**: $0.06/M  
**Output**: $0  
**Released**: 2026-10-06  
**Web page**: https://anyrouter.dev/model/nace-ai/drex-v2.0

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

**Capabilities**: systemone

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

## 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": "nace-ai/drex-v2.0",
  "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 |
| --- | --- | --- |
| nace-ai | $0.06/M | $0 |
| nace-ai-byok | $0 | $0 |
| openrouter-byok | $0 | $0 |

## Source

- Upstream docs: https://openrouter.ai/nace-ai/drex-v2.0