How much does Muse Spark Open cost?

On the Respan gateway, Muse Spark Open costs $1.25 per 1M input tokens and $4.25 per 1M output tokens on every provider, after gateway discounts.

Which providers serve Muse Spark Open on Respan?

Muse Spark Open is available through 4 providers: Baseten, Nebius, OpenRouter, and TogetherAI.

What is Muse Spark Open's context window?

Muse Spark Open accepts up to 1M tokens of context on its largest provider route.

How do I use Muse Spark Open with the Respan gateway?

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "muse-spark-open". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Muse Spark Open

Muse Spark Open is a coding-optimized open-weight model. Trained specifically for agentic coding workflows, it delivers higher first-attempt accuracy, reliable tool calling, and deep codebase understanding across the repos developers...

Input / output price: $1.25 / $4.25 per 1M
Context: 1M tokens
Released: Oct 15, 2026

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Agent setup

Paste into Claude Code, Cursor, or Codex

Help me set up the Respan gateway: fetch and follow https://www.respan.ai/docs/agent-setup.md. Use model "muse-spark-open".

from openai import OpenAI

client = OpenAI(

    base_url="https://api.respan.ai/api/",

    api_key="YOUR_RESPAN_API_KEY",

)

response = client.chat.completions.create(

    model="muse-spark-open",

    messages=[{"role": "user", "content": "Hello!"}],

)

print(response.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({

  baseURL: "https://api.respan.ai/api/",

  apiKey: "YOUR_RESPAN_API_KEY",

});

const response = await client.chat.completions.create({

  model: "muse-spark-open",

  messages: [{ role: "user", content: "Hello!" }],

});

console.log(response.choices[0].message.content);

curl https://api.respan.ai/api/chat/completions \

  -H "Authorization: Bearer YOUR_RESPAN_API_KEY" \

  -H "Content-Type: application/json" \

  -d '{

    "model": "muse-spark-open",

    "messages": [{"role": "user", "content": "Hello!"}]

}'

Read docs

Providers

4 providers, cheapest first, priced per 1M tokens after gateway discounts.

Provider	Context	Input	Output	Cache read	Capabilities
Baseten`baseten/meta-models/muse-spark-open`	1M	$1.25/M	$4.25/M	$0.15/M	+2
Nebius`nebius/meta-models/muse-spark-open`	1M	$1.25/M	$4.25/M	$0.00/M	+2
OpenRouter`openrouter/meta/muse-spark-open`	1M	$1.25/M	$4.25/M	$0.15/M	+2
TogetherAI`together_ai/meta-models/Muse-Spark-Open-816B-A42B`	1M	$1.25/M	$4.25/M	$0.15/M