Meta Muse Spark 1.3

muse-spark-1.3 is Meta’s multimodal model for long-horizon agentic and coding work, available via Muse Code and the Meta Model API. Versus 1.2, it improves multi-step tool use, long-thread collaboration, instruction following, and coding usability, with fewer tool calls and tokens, plus stronger prompt-injection resistance and judgment on irreversible actions. It offers about a 1M-token context, accepts text, image, video, audio, and PDF, and outputs text—ideal for coding assistants, agents, and complex workflows.