Muse Spark 1.3 Contributor
The same Muse Spark 1.3 at a far lower price — because Meta may train on what you send it.
About Muse Spark 1.3 Contributor
This is not a different model. It is Muse Spark 1.3 sold under Meta’s Contributor terms: a heavy discount in exchange for permission to use your prompts and the model’s answers to train future Meta models. Everything you send, and everything it sends back, may become training data.
That makes it a good deal for the right work — prototypes, experiments, public code, benchmark runs — and the wrong model for anything confidential. Meta has published no retention period or way to withdraw consent that we could find, so treat every request as a permanent donation.
Where it’s strong
Prototypes and experiments on data that is not sensitive.
Agents working on public or open-source code.
Large test and benchmark runs where cost matters more than privacy.
Where to be careful
Do not send customer data, personal data, confidential documents or anything regulated: Meta may use it to train its models.
Lower rate limits than the standard Muse Spark 1.3.
Your users cannot tell which version their data went through — only the model name in your code decides it — so say so in your own product.
Price
For scale: 1,000 requests of about 3,000 tokens in and 1,000 out cost $0.65 — a long prompt and a page of answer each. Every rate is published and stays the same from one request to the next. See every model.
Specs
muse-spark-1.3-contributorCall it
Use the OpenAI SDK you already have — point it at Roar AI and name the model. Read the docs.
from openai import OpenAI
client = OpenAI(base_url="https://api.roar-ai.com/v1", api_key="roar_live_…")
reply = client.chat.completions.create(
model="muse-spark-1.3-contributor",
messages=[{"role": "user", "content": "Summarise this contract in plain English."}],
)Compare Muse Spark 1.3 Contributor
Questions
How much does Muse Spark 1.3 Contributor cost?
Input is $0.13 per 1M tokens; output is $0.26 per 1M tokens. For scale, 1,000 requests of about 3,000 tokens in and 1,000 out cost $0.65. The rate is published and does not change from one request to the next.
Can I use Muse Spark 1.3 Contributor alongside other models?
Yes. Every model on Roar AI is on the same API key and the same monthly invoice, so switching from Muse Spark 1.3 Contributor to another model is a change to one word in your code.
Is Muse Spark 1.3 Contributor open source?
No. Meta does not publish the weights, so it is only available through an API like this one.