Meta reported in October 2026 that Muse Spark Open beats Alibaba's Qwen 3.8, Z.ai's GLM 5.3 and Moonshot AI's Kimi K3 in agentic, knowledge and multimodal benchmarks but trails some rivals in coding

Meta's open-weight AI model released on October 15, 2026: an 816-billion-parameter multimodal model with a 1 million token context window, which Meta calls the most capable US open-weight model to date.