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

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

TL;DR Verdict
🏆 Benchmark RankRank
Agent Arena scores long-horizon tool-using workflows; leaderboard scores coming soon.
Full Leaderboard→
💰 Cost & PlansCompare
in: $1.25 / out: $4.25
Compare Plans↗
🛠️ Ecosystem & IDERules
Claude Code (Anthropic) · Cursor Composer (Agent Mode)
Setup IDE Rules↗
🧭

Heavy Claude Code use: compare subscription limits and API bills

Compare 40 dev plans & simulate token costs vs $20/mo subscriptions

⚔️ Compare Model→💰 Compare plans & limits↗
Action HubReady to adopt this in production?

Benchmark side-by-side against alternatives, or calculate monthly token cost vs subscription break-even.

⚔️ Launch VS Compare→💳 View Plans↗
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