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© Arena Intelligence 2026

Measuring AIin the real-world

Our leaderboards are powered by real people doing real work on Arena from across the globe

357,375,699357,375,699Total Sessions

New Release Rankings

GPT 6.1 Sol

is #3 in WebDev · Max
Anthropic

Claude Sonnet 5.5

is #5 in WebDev · High

Mimo V2.6 Flash

is #45 in Vision

Top 10 Agents

Best Overall
1AnthropicClaude Fable 5.1 (Max)14.58%
2GPT 6 Astra (Max)11.78%
3AnthropicClaude Opus 5.5 (High)11.15%
4GPT 6 Sol (Max)9.23%
5AnthropicClaude Opus 5 (Max)8.62%
6AnthropicClaude Opus 5 (High)8.58%
7AnthropicClaude Fable 5 (High)7.98%
8AnthropicClaude Opus 4.8 (High)6.88%
9GPT 5.6 Sol (xHigh)6.67%
10AnthropicClaude Sonnet 5 (High)4.71%
View all

Pareto Frontier

Best Overall
View details
View details

Pareto Optimal Models

Best Overall
AnthropicClaude Fable 5.1 (Max)$3.99/task14.58%
GPT 6 Astra (Max)$2.68/task11.78%
AnthropicClaude Opus 5.5 (High)$1.51/task11.15%
GPT 6 Sol (Max)$0.92/task9.23%
AnthropicClaude Sonnet 5 (High)$0.88/task4.71%
TencentHy4 preview$0.29/task4.31%
Deepseek V4.1 Flash (Max)$0.09/task4.13%
GPT 6 Luna (Max)$0.07/task1.84%
TencentHy3$0.05/task5.67%
Mimo V2.5 Pro$0.04/task7.30%
View details

Model Capabilities

First impressions of new models, straight from the Arena team.

Sonnet 5.5 vs GPT-6.1 Sol | First Impressions

A hands-on first look at Sonnet 5.5 vs GPT-6.1 Sol in the Arena.

GPT-6 Sol | First impressions

A hands-on first look at GPT-6 Sol in the Arena.

GPT-6-Astra | First impressions

A hands-on first look at GPT-6-Astra in the Arena.

Claude Fable 5.1 | First impressions

A hands-on first look at Claude Fable 5.1 in the Arena.

Qwen 3.8 27B | First impressions

A hands-on first look at Qwen 3.8 27B in the Arena.

Claude Opus 5 | First impressions

A hands-on first look at Claude Opus 5 in the Arena.

Kimi K3 | First impressions

A hands-on first look at Kimi K3 in the Arena.

Arena News

The latest posts from the Arena blog.

HarnessTax: How Much Does the Harness Matter for Coding Agents?

September 16, 2026

Call for Proposals: Arena's Academic Partnerships Program, Fall 2026

September 1, 2026

Announcing the First Cohort of Arena's Academic Partnerships Program

September 1, 2026

Coding in Agent Mode: From Idea to Shipping with GitHub

August 24, 2026

Agent Leaderboard Improvements: Categories & Task Cost

August 14, 2026

Introducing AutoEval to the Arena leaderboards

July 30, 2026