Day 0 support: Meta Muse Spark 1.3
LiteLLM now offers muse-spark-1.3 and muse-spark-1.3-contributor on day 0, through the meta/ route on the Meta Model API. Meta ships 1.3 today in Muse Code and the Model API, tuned for long-horizon agentic and coding work, and reports roughly 20% fewer tool calls and 25% fewer tokens than 1.2 internally.