Windsurf Wave 13 Introduces Arena Mode, Plan Mode, and Parallel Multi-Agent Sessions

Summary

Windsurf maintained its top ranking in February 2026 AI coding assistant evaluations with the release of Wave 13. Three standout features: Arena Mode enables side-by-side model comparison with hidden identities and voting (similar to Chatbot Arena but embedded in the IDE), Plan Mode adds structured task planning before code generation, and first-class parallel multi-agent sessions with Git worktrees enable true concurrent development on independent branches. The parallel multi-agent feature is