Chart of the Day
One AI chart a day. We take what moved on the LLM leaderboard, in frontier-lab launches and in the news, rebuild it from primary data, and read it for distribution.
Best AI for Creative Writing: Arena Rankings
claude-fable-5.1-max leads Arena creative writing, with 9 more models inside its interval. Some models that rank high overall fall a long way here.
Best AI for Math: The Arena Math Leaderboard
claude-opus-5-max tops Arena math, but 14 models from 5 labs are statistically tied with it. 4 of them are lighter "Flash" models.
LLM Leaderboard Top 10: #1 Leads #10 by 18 Points
The #10 model on the Arena board would now win 47% of blind votes against #1. When the top ten are this close, quality stops deciding the sale.
Chinese AI Models vs. US Models: How Close Is China?
The best Chinese model trails the best US model by 27 Arena points, down from 156 in Jan 2024. A year ago it was 27.
Claude vs ChatGPT: Which Ranks Higher on the Leaderboard?
Claude's best model rates 40 points above OpenAI's best on the Arena board. The lead has changed hands 15 times since 2024, usually by a few points.
Anthropic vs. OpenAI vs. Google: Who Holds the Top 20?
Two labs now hold 15 of the Arena's top 20 spots. OpenAI, which held the most in Apr 2025, holds none.
How Many AI Models Are There? Arena Rates 399
The Arena text board now rates 399 models from 52 labs. Only 5 labs have a model in its top 20. Supply keeps growing; the top keeps narrowing.
Best LLM for Coding: The Arena Coding Leaderboard
Anthropic has had the top coding model on every Arena snapshot for 9 months. Two lighter models from other labs are now inside its margin of error.