Meta Launches Muse Spark 1.1 with 1 Million Token Context Window

On July 9, 2026, Meta released Muse Spark 1.1, which boasts a context window size of 1 million tokens, significantly improving performance over its predecessor, Muse Spark. This model is part of the Meta Model API, now in public preview for developers, and is available through the Meta AI app.

Muse Spark 1.1 features full multimodal support, including images, video, and PDFs, along with built-in search capabilities that provide citations. It demonstrates strong reasoning abilities and top-tier coding performance, particularly in frontend and design tasks. The model also exhibits lower hallucination rates and reduced sycophancy, enhancing its reliability for practical applications.

Amjad Masad, CEO of Replit, highlighted the model's extensive capabilities, stating it packs a complete agentic foundation into a single package. Saoud Rizwan, CEO of Cline, noted that Meta is targeting serious agentic coding, making it viable for real coding workloads at scale. Yashodha Bhavnani, VP of AI Products at Box, confirmed that Muse Spark 1.1 competes with leading frontier models in enterprise capabilities, particularly for structured workflows across various industries.

Additionally, Muse Spark 1.1 shows strong resistance to direct jailbreaks and indirect attacks, making it a robust choice for developers. This follows Meta's recent initiatives to enhance AI tools for business, including the introduction of AI agents for WhatsApp business management.

Overall, Muse Spark 1.1 positions itself as a compelling option for organizations looking to leverage advanced AI capabilities in their operations.