Muse Spark 1.3 Contributor

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meta/muse-spark-1.3-contributor

Muse Spark 1.3 Contributor — Meta's reasoning model for agents and coding, with a 1M-token context. Requests may be used by Meta for training.

Get an API key View code sample

Context window: 1M
Max output: 128K
Input modalities: text · image
Output modalities: text
Capabilities: Vision · Reasoning · Tool calling · Coding · Prompt cache
Upstream release: 2026-09-02
RouteMux name: meta/muse-spark-1.3-contributor

Live model playground

Try Muse Spark 1.3 Contributor here

Tune the request, see the current price ceiling, and inspect the real response without leaving this model page.

streamchat

1Configure input

Prompt

0 / 20,000

Add images

Maximum estimated cost—

2Live result

Your result will appear here

Enter an input on the left. The same RouteMux Playground execution and billing path powers this embedded test.

Muse Spark 1.3 Contributor API pricing

Prices verified 2026-10-20

InputOfficial $0.1 / M tokens

$0.05/ M tokensSave 50%

OutputOfficial $0.2 / M tokens

$0.1/ M tokensSave 50%

Cache read $0.001/M · Cache write —/M

Estimate cost

Input tokensOutput tokens

Estimated cost$0.0006

Limited time10% extra Credits on your first top-up — up to 200 bonus Credits

Applies to your first top-up within 72 hours of signing up. Minimum $20, once per account.

Key capabilities

VisionReasoningTool callingCodingPrompt cache

Interface and protocols

OpenAI Chat CompletionsStreamingOpenAI ResponsesStreaming

Use any of these IDs to call this model via the API.

RouteMux namemeta/muse-spark-1.3-contributor

Replace the ROUTEMUX_KEY placeholder with your API key. Create one →

from openai import OpenAI

client = OpenAI(
    base_url="https://api.routemux.com/v1",
    api_key="<ROUTEMUX_KEY>",
)

completion = client.chat.completions.create(
    model="meta/muse-spark-1.3-contributor",
    messages=[{"role": "user", "content": "What is the meaning of life?"}],
)
print(completion.choices[0].message.content)

base_url: https://api.routemux.com/v1

Performance (last 30 days)

0 requests · last 30 days

Total usage—

P50 first-token latencyInsufficient data (0 requests)

Avg throughputInsufficient data (0 requests)

Success rate100.0%

Uptime · 24htested via openai_chat

100.00%

Muse Spark 1.3 Contributor FAQ

›What is Muse Spark 1.3 Contributor?

Muse Spark 1.3 Contributor — Meta's reasoning model for agents and coding, with a 1M-token context. Requests may be used by Meta for training.

›How large is the context window of Muse Spark 1.3 Contributor?

Muse Spark 1.3 Contributor supports a context window of up to 1M tokens, with up to 128K output tokens per request.

›How much does the Muse Spark 1.3 Contributor API cost?

Through RouteMux, Muse Spark 1.3 Contributor costs $0.05 for input and $0.1 for output (USD per 1M tokens), below the official list price.

›How do I call Muse Spark 1.3 Contributor via API?

Muse Spark 1.3 Contributor is OpenAI-compatible: point your base URL at RouteMux and set the model field to meta/muse-spark-1.3-contributor — no code changes needed.

›Which input and output modalities does Muse Spark 1.3 Contributor support?

Muse Spark 1.3 Contributor accepts text, image as input and produces text as output.

›When was Muse Spark 1.3 Contributor released?

Muse Spark 1.3 Contributor was released on September 2, 2026.

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