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Meta unveils Muse Ember, its smallest and most efficient AI model
Meta describes Muse Ember as its “smallest and most efficient” AI model, designed for complex reasoning and repetitive tasks handled by agents. The company says it offers “more intelligence per dollar” than two rival models at any reasoning setting.

Meta says Muse Ember is built for tool calls, coding subtasks, routing, extraction and parsing long documents. The company characterizes these as tasks agents repeat throughout the day.
Meta claims the model delivers “more intelligence per dollar” than Anthropic’s Claude Haiku 5.5 and OpenAI’s GPT-6 Luna “at any reasoning setting.”
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