Muse Spark 1.3 and a cheaper Contributor tier land on OpenRouter
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Muse Spark 1.3 is now available on OpenRouter! Built for long-running agentic, multi-agent, and coding workflows. It tracks what it learns, handles conflicting inputs, and asks for clarification or confirmation when needed. Use it now: https://t.co/vKNEn6KtVD
Muse Spark 1.3 Contributor is also live, and is the cost-efficient tier. Use it now: https://t.co/R4yVY7vIom
Context
OpenRouter says Meta's Muse Spark 1.3, built for long-running agentic, and coding workflows that track state, handle conflicting inputs and ask for clarification, is now live on the platform alongside a separate Muse Spark 1.3 Contributor tier described as more cost-efficient. This post does not state pricing or data-use terms for the Contributor tier.
When OpenRouter listed the equivalent tier for Muse Spark 1.2, it priced Contributor access at $0.10/$0.20 per million tokens in exchange for Meta training on that traffic. Whether the same terms apply to the 1.3 Contributor tier is not confirmed in this post.
- multi-agent — Using several AI agents on one problem — splitting work in parallel, checking each other, or filling different roles like planner and reviewer.
- token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
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