How do I use Muse Spark 1.3 through YepAPI?

Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.

MetaText Generation/v1/ai/chat

Muse Spark 1.3

Access Muse Spark 1.3 through one API key. Meta Multimodal Agentic Reasoning.

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent and coding workflows. Muse Spark 1.3 suits agents that run for a long time over mixed media — video, audio, documents — and multi-agent systems that need a capable, mid-priced coordinator.

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No credit card required. Takes 30 seconds.

2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see Muse Spark 1.3 respond in real time.

POST/v1/ai/chatmeta/muse-spark-1.3

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

Context Window

1.0M tokens

Max Output

944K tokens

Input Price

$1.85 / 1M tokens

Output Price

$6.28 / 1M tokens

Strengths

✓

Long-running agents

Built to track state across extended, multi-step and multi-agent tasks.

✓

Full multimodal input

Accepts text, images, files, audio and video.

✓

1M context, very large output

Handles up to 1,048,576 input tokens and returns up to 943,718 output tokens per call.

✓

Mid-tier price

$1.85 per 1M input and $6.28 per 1M output tokens.

Quick start

Copy this snippet and start making calls with Muse Spark 1.3.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "meta/muse-spark-1.3",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Why use Muse Spark 1.3 through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

Muse Spark 1.3 API — pricing, context window & access

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent and coding workflows. It pairs a 1,048,576-token context window with up to 943,718 output tokens per response, at $1.85 per 1M input and $6.28 per 1M output tokens through YepAPI.

Through YepAPI you call Muse Spark 1.3 on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, files, audio, video.

What is Muse Spark 1.3?

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent and coding workflows. It is designed to keep track of information across extended tasks and work through problems step by step, and it accepts text, images, files, audio and video, with a 1,048,576-token context window and up to 943,718 output tokens at $1.85 / $6.28 per 1M tokens. It accepts text, images, files, audio, video as input, handles up to 1,048,576 tokens of context and returns up to 943,718 output tokens per call.

Build with Muse Spark 1.3 via YepAPI

YepAPI serves Muse Spark 1.3 on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to muse-spark-1.3 (or the full meta/muse-spark-1.3). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

Muse Spark 1.3 API pricing — $1.85 / 1M input, $6.28 / 1M output

Muse Spark 1.3 costs $1.85 per 1M input tokens and $6.28 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs so you can see exactly what a very long response cost.

Muse Spark 1.3 use cases

Muse Spark 1.3 suits agents that run for a long time over mixed media — video, audio, documents — and multi-agent systems that need a capable, mid-priced coordinator.

Try Muse Spark 1.3 free

Every new YepAPI account includes $5 in free credit with no card required — enough to test Muse Spark 1.3 on your own prompts before committing to paid usage. Create an account, copy your key, and call muse-spark-1.3 right away.