Research

Arena Team

Published on 4 Dec 2025
Last updated on 4 Dec 2025
Reading Time: 1 minute

Studying the Frontier: Arena Expert

Arena Expert is a great way to differentiate between frontier models. In this analysis, we compare how models perform on 'general' vs 'expert' prompts, focusing on 'thinking' vs 'non-thinking' models.

Share this Article

Coding in Agent Mode: From Idea to Shipping with GitHub

AI coding assistants have fundamentally changed how code is created. But for most developers, a chat interface has been a "read-only" or "copy-paste" coding experience — until now.

Product

Arena Team—24 Aug 2026

Agent Leaderboard Improvements: Categories & Task Cost

Agents are being asked to do a wide variety of work. This means a single, performance-only agentic leaderboard is no longer sufficient. Two questions decide which model to use: what’s best for my specific kind of task, and what will it cost to get that task done? We aim to help answer these questions with our latest update to Agent Arena.

Product

Arena Team—14 Aug 2026

Introducing AutoEval to the Arena leaderboards

At Arena, our evaluations are dynamic and grounded in real-world use. But real-world signals take time to collect. Today, we’re introducing AutoEval scores to provide immediate, calibrated model ratings on real tasks when waiting for human votes to accumulate.

Product

Arena Team—30 Jul 2026

Text Arena and Search Arena scores with the factuality adjustment on

Factuality in the Arena

Factuality remains one of the most persistent questions users face when using AI models. Today, we are launching a leaderboard that ranks models not only by human preference, but also by the factual accuracy of their responses.

Research

Product

Arena Team—14 Jul 2026

Build, Deploy, and Evaluate with Fullstack Code Arena

Code Arena has evolved beyond frontend prototyping into a complete fullstack AI development platform. Explore capabilities like databases, authentication, third-party integrations, and deployments, and see how Fullstack Code Arena helps developers, entrepreneurs, and AI labs build, deploy, and evaluate production-ready applications.

Product

Arena Team—2 Jul 2026

Arena Reaches $100M in 8 Months

Arena achieves $100M annualized run rate in eight months, driven by 10M+ monthly users who have contributed 700M+ conversations and 82M+ votes to build the world's largest human-preference dataset for AI evaluation.

News

Anastasios Angelopoulos—29 Jun 2026

Agent Arena: Causal Evaluation of Agents in the Real World

Agents are increasingly doing real work. The resulting task distribution has greatly expanded. We desire an agent evaluation that scales along with usage and capability.

Product

Research

Arena Team—4 Jun 2026

Empowering Users to Get More Done With Agent Mode

The future of AI is not single-modality chat; it is in powerful agentic capabilities. Today, we are excited to introduce Agent Mode, designed to help everyone from everyday users looking to get more done to entrepreneurs looking to maximize agentic efficacy across complex use cases.

Product

Arena Team—4 Jun 2026

New Categories for Web Development in Code Arena

AI coding models are increasingly used to build web apps, but aggregated leaderboards obscure key performance differences. After analyzing 250k+ Code Arena prompts, we identified major front-end task categories and built new leaderboard views to compare model strengths and weaknesses.

Product

Arena Team—8 May 2026

See All Articles

Studying the Frontier: Arena Expert

Share this Article

Related Articles

Coding in Agent Mode: From Idea to Shipping with GitHub

Agent Leaderboard Improvements: Categories & Task Cost

Introducing AutoEval to the Arena leaderboards

Factuality in the Arena

Build, Deploy, and Evaluate with Fullstack Code Arena

Arena Reaches $100M in 8 Months

Agent Arena: Causal Evaluation of Agents in the Real World

Empowering Users to Get More Done With Agent Mode

New Categories for Web Development in Code Arena

Subscribe
to Arena news and research

Studying the Frontier: Arena Expert

Share this Article

Related Articles

Coding in Agent Mode: From Idea to Shipping with GitHub

Agent Leaderboard Improvements: Categories & Task Cost

Introducing AutoEval to the Arena leaderboards

Factuality in the Arena

Build, Deploy, and Evaluate with Fullstack Code Arena

Arena Reaches $100M in 8 Months

Agent Arena: Causal Evaluation of Agents in the Real World

Empowering Users to Get More Done With Agent Mode

New Categories for Web Development in Code Arena

Subscribe
to Arena news and research

Studying the Frontier: Arena Expert

Share this Article

Related Articles

Coding in Agent Mode: From Idea to Shipping with GitHub

Agent Leaderboard Improvements: Categories & Task Cost

Introducing AutoEval to the Arena leaderboards

Factuality in the Arena

Build, Deploy, and Evaluate with Fullstack Code Arena

Arena Reaches $100M in 8 Months

Agent Arena: Causal Evaluation of Agents in the Real World

Empowering Users to Get More Done With Agent Mode

New Categories for Web Development in Code Arena

Subscribeto Arena news and research

Studying the Frontier: Arena Expert

Share this Article

Related Articles

Coding in Agent Mode: From Idea to Shipping with GitHub

Agent Leaderboard Improvements: Categories & Task Cost

Introducing AutoEval to the Arena leaderboards

Factuality in the Arena

Build, Deploy, and Evaluate with Fullstack Code Arena

Arena Reaches $100M in 8 Months

Agent Arena: Causal Evaluation of Agents in the Real World

Empowering Users to Get More Done With Agent Mode

New Categories for Web Development in Code Arena

Subscribeto Arena news and research

Subscribe
to Arena news and research

Subscribe
to Arena news and research