# Frantic Ferret

> Frantic Ferret is an anonymous stealth preview model surfaced on OpenCode Zen. It is a multimodal chat model that reads text, images, video, and PDF input and produces text output, with reasoning, tool use, and structured output. The provider has not been publicly identified. Free during the preview.

**ID**: `stealth/frantic-ferret`  
**Creator**: stealth  
**Category**: text  
**Context**: 1M tokens  
**Pricing**: BYOK — billed by your provider  
**Released**: 2026-11-08  
**Web page**: https://anyrouter.dev/model/stealth/frantic-ferret

**Input modalities**: text, image, video, pdf  
**Output modalities**: text  

**Capabilities**: chat, streaming, reasoning, function-calling, structured-output, vision, agentic

**Supported parameters**: max_tokens, temperature, tools, tool_choice, response_format, structured_outputs, reasoning, reasoning_effort

## Usage

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

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "stealth/frantic-ferret",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| opencode-zen-byok | BYOK — billed by your provider | — |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://opencode.ai/zen/v1/models