Gemini 4 Argon (High) ranks in the top 5 for Agent Arena.

LMArena congratulates Google DeepMind as Gemini 4 Argon (High) ranks top 5 on Agent Arena. The updated leaderboard, using a new Bash Reliability signal, has Claude Opus 5.5 first; the top 14 are proprietary, with GLM 5.2 the best open-weights model at #15.