OpenRouter: Muse Spark 1.2 (OpenRouter)

Name: Muse Spark 1.2 (OpenRouter) API
Brand: Meta

stable

Muse Spark 1.2 (OpenRouter) is available through Everstack's OpenAI-compatible gateway with routing, fallback, retries, and observability.

meta-muse-spark-1.2musereleased Aug 5, 2026

Provider Quick start

Context

1.0M

tokens

Max output

943.7K

tokens

Input

$1.25

per 1M

Output

$4.25

per 1M

Activity

Daily period usage

Aggregated managed Everstack traffic. Buckets below 5 tenants or 100 requests are withheld.

Providers

ProviderContextInput /MOutput /M

OpenRouter

1.0M$1.25$4.25

Pricing

Item	Price	Unit
Input	$1.25	per 1M tokens
Output	$4.25	per 1M tokens
Cache read	$0.15	per 1M tokens

Performance

Reliability

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Capabilities

Modalities

Input

Output

Details

Model ID: meta-muse-spark-1.2
Family: muse
Status: stable
Knowledge: -
Released: Aug 5, 2026

Gateway Config

API: 2024-01-01
Auth: OPENROUTER_API_KEY
Discovery: dynamic
Provider type: meta

Quick Start

index.ts

import Everstack from "@everstack/node";const client = new Everstack({  apiKey: process.env.EVERSTACK_API_KEY!,  baseUrl: "https://{instance}.{region}.everstack.ai",});const completion = await client.chat.completions.create({  model: "@openrouter/meta-muse-spark-1.2",  messages: [{ role: "user", content: "Explain vector cache routing." }],});console.log(completion.choices[0]?.message?.content);

Endpoint

Base URL

https://openrouter.ai/api/v1

Chat completions

https://openrouter.ai/api/v1/chat/completions

Model

meta-muse-spark-1.2

Auth env

OPENROUTER_API_KEY

Muse Spark 1.2 (OpenRouter) FAQ

How much does the Muse Spark 1.2 (OpenRouter) API cost?

Through OpenRouter, Muse Spark 1.2 (OpenRouter) costs $1.25 per 1M input tokens and $4.25 per 1M output tokens.

What is the context window of Muse Spark 1.2 (OpenRouter)?

Muse Spark 1.2 (OpenRouter) accepts up to 1.0M tokens of context and returns up to 943.7K output tokens on OpenRouter.

What can Muse Spark 1.2 (OpenRouter) do?

Muse Spark 1.2 (OpenRouter) supports chat, function calling, image input and reasoning. It accepts text, image, video, PDF and audio input.

How do I call Muse Spark 1.2 (OpenRouter) through Everstack?

Point any OpenAI-compatible SDK at your Everstack gateway and set the model to @openrouter/meta-muse-spark-1.2. Everstack adds retries, provider fallback, caching, per-tenant budgets and OpenTelemetry traces for every request.