{
  "id": 16729,
  "url": "https://simonwillison.net/2026/Aug/5/muse-code-and-muse-spark-12",
  "title": "Introducing Muse Code and Muse Spark 1.2",
  "summary": "Introducing Muse Code and Muse Spark 1.2 Yet more evidence that the most important characteristic of any model these days is long-sequence agentic tool calling. Meta shipped their own coding agent as part of getting that to work! Muse Spark 1.2 is a coding-focused update to Muse Spark 1.1, with improvements in code generation, complex debugging, codebase understanding, and end-to-end developer workflows. In Muse Spark 1.2, we significantly scaled up training compute on coding tasks while expandi",
  "authors": null,
  "category": "org",
  "topics": "agents-autonomy",
  "orgs": "meta",
  "regions": null,
  "published_at": "2026-08-05T23:58:35.000Z",
  "fetched_at": "2026-08-06T05:10:11.148Z",
  "source_slug": "x-simon-willisons-weblog",
  "source_name": "Simon Willisons Weblog",
  "source_homepage": "https://simonwillison.net",
  "ethics_ai_record_url": "https://ethics.ai/record/16729",
  "original_url": "https://simonwillison.net/2026/Aug/5/muse-code-and-muse-spark-12",
  "evidence_status": "source-only",
  "attribution": "via ethics.ai"
}