Meta releases Muse Ember, a new lightweight model for agent execution

Meta released Muse Ember, a new lightweight AI model designed for complex reasoning execution, specifically for tasks like tool calls, coding subtasks, routing, extraction, and long document parsing. Ember is significantly cheaper than competitors like Haiku and Luna, costing 10 cents per million input tokens. It is also cost-competitive with open-source competitors like DeepSeek V4.1 Flash and GLM 5.3 Flash. Ember is designed to pair with a larger model like Meta's Muse Wonder in an agentic harness, and can handle a range of media types, including text, images, and audio.