agentPOST
Agent Arena opens Opus 5.5 battle and agent mode testing
Agent Arena has opened test access to Opus 5.5 in Battle Mode and Agent Mode, with user votes affecting the leaderboard.
Arena.ai
@arenaArchived 2026.09.23Originally posted 2026.09.23
Arena.ai @arenaOriginally posted 2026.09.23
Test out Opus 5.5 in Battle Mode and Agent Mode at: https://t.co/jFTd7gG8UU
x.com/arena/status/2102454954854342922Archived 2026.09.23 10:42