# Muse Spark 1.3

> Meta's Muse Spark 1.3 is a multimodal reasoning model for complex agentic tasks. It accepts text, images, video, audio, and PDF documents, returns text, and offers a 1M-token context window.

**ID**: `meta/muse-spark-1.3`  
**Creator**: meta  
**Category**: multimodal  
**Context**: 1M tokens  
**Pricing**: $1.25 / $4.25 per 1M · billed by your provider (BYOK)  
**Released**: 2026-09-04  
**Web page**: https://anyrouter.dev/model/meta/muse-spark-1.3

**Input modalities**: text, image, video, file, audio  
**Output modalities**: text  

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

**Supported parameters**: max_tokens, temperature, top_p, stop, tools, tool_choice, response_format, reasoning, include_reasoning, structured_outputs

## 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": "meta/muse-spark-1.3",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| aihubmix-byok | $1.38/M (list) | $4.67/M (list) |
| vercel-byok | $1.25/M (list) | $4.25/M (list) |

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://ai.meta.com/muse-spark