Meta released Muse Spark 1.3, an agentic AI model designed for sustained long-form task execution with 25% lower token usage and improved multi-tasking capabilities. Key improvements include better context preservation in complex multi-step instructions, 20% fewer tool calls, enhanced human-AI collaboration (asking clarifications, requesting confirmations for high-impact actions), and stronger resistance to prompt injection attacks. The model supports 1M token context windows and multimodal inputs, available now on Muse Code and Meta Model API. Relevance: SME developers using AI coding assistants or API consumers will see direct cost savings and efficiency gains; the shift toward "agentic" AI marks a pivotal transition in how businesses deploy autonomous task completion.