Introducing Muse Code and Muse Spark 1.2

This article announces Meta's release of Muse Code and Muse Spark 1.2, a coding-focused update to their AI model. It highlights the model's improvements in code generation, complex debugging, codebase understanding, and end-to-end developer workflows, with a significant scale-up in training compute on coding tasks. The model is co-trained with Muse Code to enhance coding usability and harness compatibility. It also introduces a unique pricing structure: the standard muse-spark-1.2 costs $1.25/million input and $4.25/million output, while a contributor version (muse-spark-1.2-contributor) offers a steep discount ($0.10/$0.20) in exchange for allowing Meta to use user data for product improvement. The article includes a comparison with other models like Gemini 3.6 Flash and GPT-5.6 Luna, and mentions the addition of these prices to llm-prices.com.