Arena (formerly LMArena) AI Releases: Agent Arena & Code Arena

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ThursdAI — the weekly AI news podcast hosted by Alex Volkov — has covered 3 Arena (formerly LMArena) releases since Nov 2025, most recently Agent Arena on Jun 4, 2026. Highlights include Code Arena, Agent Arena. 1 of them shipped with open weights. Every entry below has primary-source links and the episode segment where we covered it live.

3 releases1 open weight3 episodesNov 2025 – Jun 2026

June 2026 1

Arena (LMArena)
Benchmarks & Evals

Agent Arena

Arena launches Agent Arena for real-world agent workflow evals

Arena (LMArena) launched Agent Arena during the episode, moving beyond one-turn chatbot preference battles to evaluate models on real agent workflows with web search, files, terminals, user corrections, and objective recovery signals. Peter Gostev joined live to explain why long-running, harder tasks need a different benchmark.

April 2026 1

DatasetsOpen weights

Arena historical leaderboard & prompt datasets

Arena releases 3 years of leaderboard data and prompts on Hugging Face

Arena (formerly LMArena) released three years of historical leaderboard data plus the actual user prompts as datasets on Hugging Face. Peter Gostev, who previously scraped the site by hand into Google Sheets for his charts, now builds his Compute Wars and model-trend analyses straight from the data.

November 2025 1