Today we're introducing Muse Ember, our smallest and most efficient model, built for complex reasoning execution and everyday agent work.
Muse Ember can carry workflows across apps, call tools in sequence, run tests and make targeted code fixes. With a 1M-token context window and native understanding of text, images, audio and video, it can also work across large document sets and varied inputs.
AI at Meta
@AIatMeta
For agents that perform hundreds of small tasks, efficiency matters at every step. Muse Ember is built to deliver more intelligence for the cost.
On the @ArtificialAnlys Intelligence Index, it achieves performance comparable to Claude Haiku 5.5 at roughly one-third of the cost per task, while scoring higher than GPT-6 Luna across all of Luna's reasoning settings.
On the @ArtificialAnlys Intelligence Index, it achieves performance comparable to Claude Haiku 5.5 at roughly one-third of the cost per task, while scoring higher than GPT-6 Luna across all of Luna's reasoning settings.

6:04 PM UTC · Nov 9, 2026 · 22.4K Views
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AI at Meta
@AIatMeta
Muse Ember is available today on the Meta Model API, at $0.10 per million input tokens and $0.50 per million output tokens.
Learn more on our research blog: go.meta.me/muse-ember
Learn more on our research blog: go.meta.me/muse-ember

research.meta.ai
Introducing Our Smallest, Most Efficient Model: Muse Ember
Muse Ember is our smallest and most efficient model, designed for complex reasoning execution and the work agents repeat all day.
6:04 PM UTC · Nov 9, 2026 · 16.3K Views
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