Arena

Introducing Agent Mode: Agentic AI is now measured in the Arena.

AI evaluation platform that runs live comparative evaluations and publishes leaderboards for models and agentic systems, including capabilities such as search, coding, file creation, and image generation.

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newsPRIMARY2026-06-04

Arena launches Agent Mode rankings with GPT-5.5 High leading

Arena shipped Agent Mode, a benchmark that lets models use web search, bash, file writing, image generation, and follow-up questions, then ranks them on five live-session signals. It matters because agent evals move from static task sets to real user workflows, with GPT-5.5 High currently leading the leaderboard.