Arena.ai (@arena) says Meta Muse Spark 1.3 is now in the Arena: Agent Arena measures long-horizon agentic tasks with web search, filesystem, and terminal tools via causal tracing vs the average model; it is also in Code Arena WebDev/Text/Vision/Document. Voting is open and scores are coming soon.

Key Takeaways

  • βœ“Muse Spark 1.3 is live in Agent Arena and Code Arena (including WebDev).
  • βœ“Agent Arena scores long-horizon tool-using workflows; leaderboard scores coming soon.
  • βœ“Voting is open so builders can stress-test prompts against frontier peers.
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