Moduck

Meta: Muse Spark Open

Muse Spark Open is an 816B total / 42B active open-weight multimodal reasoning model from Meta for coding and long-horizon agentic work, with 1M-token context.

Model lab
Meta
Model family
muse
Modalitiestext, image, video, audio → text
Context window1,048,576
Maximum output131,072
InputUSD 1 / 1M tokens
OutputUSD 3.4 / 1M tokens

Quickstart

Use your Moduck API Key, set the API base URL to https://api.moduck.ai/v1, and set the model parameter to meta/muse-spark-open.

import os
import requests

base_url = "https://api.moduck.ai/v1"
api_key = os.environ["MODUCK_API_KEY"]
model_id = "meta/muse-spark-open"

response = requests.post(
    f"{base_url}/chat/completions",
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    json={
        "model": model_id,
        "messages": [{"role": "user", "content": "Hello!"}],
        "stream": False,
    },
    timeout=60,
)
response.raise_for_status()
print(response.json())

Use the familiar OpenAI-style chat request format to make model integration easier.

Muse Spark Open API Pricing

TypePrice information
InputUSD 1 / 1M tokens
OutputUSD 3.4 / 1M tokens
Cached inputUSD 0.12 / 1M tokens

Benchmarks

BenchmarkScoreMeasurementSource
Artificial Analysis Intelligence Index39index score · Variant: xhigh effort · Date: 2026-10-15
JobBench61.8Variant: xhigh effort · Date: 2026-10-15
MCP Atlas89.2Variant: xhigh effort · Date: 2026-10-15
GDPval-AA1,401Elo · Variant: xhigh effort · Version: 2 · Date: 2026-10-15
OSWorld-Verified80.4Variant: xhigh effort · Date: 2026-10-15
Toolathlon-Verified72.8Variant: xhigh effort · Date: 2026-10-15
HLE-Diamond26.1Variant: xhigh effort, no tools · Date: 2026-10-15
AA-Omniscience25Variant: xhigh effort · Date: 2026-10-15
SciCode58.5Variant: xhigh effort · Date: 2026-10-15
Humanity's Last Exam61Variant: xhigh effort, with tools · Date: 2026-10-15
GPQA Diamond89Variant: xhigh effort · Date: 2026-10-15
DeepSWE60Variant: xhigh effort · Harness: preferred harness · Version: 1.1 · Date: 2026-10-15
SWE-Atlas Codebase QnA58Variant: xhigh effort · Harness: preferred harness · Date: 2026-10-15
Terminal-Bench76.4Variant: xhigh effort · Harness: Terminus 2 · Version: 2.1 · Date: 2026-10-15
ZeroBench50Variant: xhigh effort, with tools · Date: 2026-10-15
BabyVision80.2Variant: xhigh effort, with tools · Date: 2026-10-15
SimpleVQA73.6Variant: xhigh effort, with tools · Date: 2026-10-15
WorldVQA49.4Variant: xhigh effort, with tools · Date: 2026-10-15
IntPhys268.3Variant: xhigh effort · Date: 2026-10-15
Video-MME61.5Variant: xhigh effort · Version: 2 · Date: 2026-10-15

Performance

Measured on the Moduck gateway across live traffic, hour by hour over the last 24 hours. Time to first token is how long before anything appears; throughput is how fast the answer is written after that; end-to-end latency is the whole round trip. Figures are medians unless the card says otherwise.

Performance trends

Throughput90.1 tok/sCurrent
Time to first token1.3 sCurrent
End-to-end latency7.2 sCurrent
Throughput
Current90.1 tok/s
Window average89.7 tok/s
Time to first token
Current1.3 s
Window average1.5 s
End-to-end latency
Current7.2 s
Window average7.5 s
Tail latency (P99)
Current16.6 s
Window average16.4 s
Prompt cache hit rate
Current19.0%
Window average24.0%
Error rate
Current0.0%
Window average0.1%

Availability

Uptime is the share of time at least one provider serving this model responded. Availability is stricter: the share of requests actually served. A provider that answers but fails part of the traffic lowers availability without lowering uptime. Both cover the last three days.

Uptime100%At least one provider responded
Availability100%Requests actually served
Error rate0%Share of failed requests
Served requests, hour by hour
24 hours agoNow

Muse Spark Open Compare models

ModelInput priceOutput priceContext windowCapabilities
Muse Spark OpenThis pageUSD 1 / 1M tokensUSD 3.4 / 1M tokens1,048,576Text output · Reasoning · Tool calling
Muse Wonder FullPrice currently unavailablePrice currently unavailable1,048,576Text output · Reasoning · Tool calling
Muse WonderUSD 3.2 / 1M tokensUSD 16 / 1M tokens1,048,576Text output · Reasoning · Tool calling
Muse Spark 1.3USD 1 / 1M tokensUSD 3.4 / 1M tokens1,048,576Text output · Reasoning · Tool calling
Muse Glimmer 30BUSD 0.2 / 1M tokensUSD 0.8 / 1M tokens131,072Text output · Reasoning · Tool calling

Model specifications

Input
text, image, video, audio
Output
text
Context window
1,048,576
Maximum output
131,072
Release date
2026-10-15
Attachments
Yes
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Temperature setting
Yes
Open weights
Yes

Frequently asked questions

What is Muse Spark Open for?

Muse Spark Open is an 816B total / 42B active open-weight multimodal reasoning model from Meta for coding and long-horizon agentic work, with 1M-token context.

What inputs and outputs does Muse Spark Open support?

Recorded inputs: text, images, video, audio; outputs: text.

How is Muse Spark Open priced?

The pricing table shows the current recorded Moduck price. For example: Input USD 1 / 1M tokens; Output USD 3.4 / 1M tokens. See the pricing table for all units, variants, and conditions.

What specifications are recorded for Muse Spark Open?

Current model records list Context window 1,048,576 tokens; Maximum output 131,072 tokens.

What model parameter does the Quickstart use?

The example uses meta/muse-spark-open. This value comes from the page identifier and is not confirmed as a callable Moduck public ID.

Can I call this model through the Moduck API now?

This page has no verified Moduck API call for this model. A Quickstart example or reserved ID does not establish access; check the models available to your account.