Gemma 4 31B Destroys Every Model on Multiple Leaderboards Except Opus 4.6 and GPT-5.2 at $0.20/Run

r/LocalLLaMA·high signal

A r/LocalLLaMA post (1,380 upvotes, 260 comments) documents Gemma 4 31B ranking #3 on Arena AI (ELO 1,452), scoring 85.2% MMLU Pro, 89.2% AIME 2026, and 80.0% LiveCodeBench v6 — outperforming models 20x its size. At $0.20 per run under Apache 2.0 license, practitioners report it's the first open model to genuinely threaten commercial API economics for production workloads.