Measuring AIin the real-world

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361,221,622Total Sessions

New Release Rankings

Claude Haiku 5.5

is #30 in WebDev · High

Gemini Nano Banana 2.1

is #6 in Text-to-Image

Mistral Large 4

is #42 in WebDev

Top 10 Agents

Best Overall

1Claude Fable 5.1 (Max)14.31%

2Claude Opus 5.5 (High)13.82%

3Claude Sonnet 5.5 (Max)12.52%

4GPT 6 Astra (Max)12.27%

5GPT 6.1 Sol (Max)11.23%

6GPT 6 Sol (Max)9.71%

7Claude Opus 5 (High)8.67%

8Claude Fable 5 (High)8.21%

9Claude Opus 5 (Max)7.92%

10Gemini 4 Argon (High)7.57%

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Live Agent Sessions

Best Overall

Deepseek V4.1 Flash (Max)
DeepSeek
Searching the web
GPT 6 Luna (Max)
OpenAI
Session complete
Qwen3.8 Max
Alibaba
Session complete
Minimax M3
MiniMax
Session complete
Deepseek V4.1 Flash (Max)
DeepSeek
Presenting the result
Deepseek V4.1 Flash (Max)
DeepSeek
Writing a file
Deepseek V4.1 Flash (Max)
DeepSeek
Reading files
Claude Opus 5.5 (High)
Anthropic
Presenting the result

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Pareto Frontier

Best Overall

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Pareto Optimal Models

Best Overall

Claude Fable 5.1 (Max)$5.98/task14.31%

Claude Opus 5.5 (High)$1.69/task13.82%

GPT 6.1 Sol (Max)$0.56/task11.23%

Deepseek V4.1 Flash (Max)$0.13/task4.02%

GPT 6 Luna (Max)$0.07/task1.35%

MiMo V2.6 Flash$0.05/task0.57%

Solar Pro 4$0.04/task15.90%

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Model Capabilities

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

Mistral Large 4 (Le Chonk) | First Impressions

A hands-on first look at Mistral Large 4 (Le Chonk) in the Arena.

Gemini 4 Argon | First Impressions

A hands-on first look at Gemini 4 Argon in the Arena.

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.

Arena News

The latest posts from the Arena blog.

Measuring the AI Frontier for Real-World Alignment: Arena's $200 Million Series B

October 8, 2026

Arena Alignment Index

October 8, 2026

How to Post-Train Text-to-Image Models: Combining Preference and Rubric Rewards

October 2, 2026

Self-Preference of AI Judges

September 30, 2026

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