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Muse Spark 1.2 Contributor

Muse Spark 1.2 Contributor serves the same weights as Muse Spark 1.2 at a substantially lower rate, in exchange for Meta using your inputs and outputs to train its models. Your use is subject to Meta's Terms & Privacy Policies.

ReasoningTool UseImplicit CachingFile InputVision (Image)
Use with AI GatewayView docs
import { streamText } from 'ai'


const result = streamText({
  model: 'meta/muse-spark-1.2-contributor',
  prompt: 'Why is the sky blue?'
})
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OverviewAPIAboutProvidersThroughputLatencyUptimeStatusSimilarFAQ

Copy link to headingAbout Muse Spark 1.2 Contributor

Muse Spark 1.2 Contributor is a pricing tier rather than a separate model. The weights, the context window of 1.0M tokens, and every capability match Muse Spark 1.2: multimodal input across text, images, video, audio, and PDFs, multi-agent operation as either a planning agent or a parallel subagent, structured output, parallel function calling, and configurable reasoning effort.

What differs is the commercial arrangement. Meta charges substantially less per token, and in exchange uses your inputs and outputs to train and improve its models. Meta has published no separate capability claim for this tier, because there is nothing different to claim.

Decide eligibility before you compare prices. Work that suits this tier is public, synthetic, permissively licensed, or explicitly approved for sharing. Client repositories, personal data, secrets, unreleased product logic, and material under NDA belong on the standard tier.

The scope is wider than the prompt you write. An agent can read terminal output, generated files, and neighbouring directories, so what reaches Meta may exceed what a developer consciously submits. Scope the working directory accordingly.

You can integrate Muse Spark 1.2 Contributor through AI SDK, Chat Completions API, Responses API, Messages API, or other API formats, from TypeScript or Python.