Muse Spark 1.3 Contributor is now available on NanoGPT and included in the subscription.
Meta calls this its biggest jump yet in coding and agentic work, with major gains in long-horizon coding, codebase understanding, computer use, browsing, instruction following, and long-context retrieval.
It accepts text, images, audio, video, and files across a 1M-token context, and supports tool calling and structured output. Contributor requests may be used by Meta to train and improve its products.
Try it:
https://nano-gpt.com/conversation?model=meta%2Fmuse-spark-1.3-contributor