Models
Anthropic
Agent Arena Leaderboard

@arenaX · Sep 28, 2026

Agent Arena Leaderboard

@arena's benchmark bar chart drew 123.1K views on X: 2.7x its median post and #344 of 1,162 AI chart posts we hold by views. Read Oct 13, 2026.

Claude Opus 5.5 (High) Ranked #2

XData Benchmark bar chart Claude Fable 5 All Anthropic modelsClaude Fable 5.1 (Max)GPT-6 Astra 5.5 (High)Claude Opus 5 (Max)Claude Opus 5 (High)GPT-6 Sol (Max)Claude Fable Opus 4.8 (High)GPT-5.6 Sol (xHigh)Claude Sonnet 5 (High)

@arena: Agent Arena Leaderboard — Published by @arena on X, Sep 28, 2026. Source: x.com

52/ 100

ViralChart score

Wide but thin

More views than the median post but a lower engagement rate: many saw it, few acted. Common for big accounts.

#593 of 1,162 AI chart posts we hold · #135 of 239 @arena posts. Score = views 40%, likes 30%, engagement rate 15%, save rate 15%, each as a percentile of every AI chart post we hold.

Our read

It sits in the Wide but thin quadrant, with a score rank of #593 of 1,162 AI chart posts.

Its 123K views led all 5 @arena posts that day, the account's #1 of 5 by views.

Saves landed at 0.033%, the 17th percentile among AI chart posts and #968 of 1,162.

At 2.7x the company median of 46.2K views, it ranked #66 of 239 @arena posts.

5posts from @arena that day

Part of a run of 5 posts on Sep 28, 2026. This one was #1 of 5 by views that day.

bottom 17%save rate

0.033% of viewers bookmarked it to come back to. The median post gets 0.076%.

2.7x@arena's median post

123.1K views, where @arena's typical post gets 46.2K.

bottom 21%engagement rate

0.43% of viewers liked, reposted, quoted or replied. The median post gets 0.73%.

Public X numbers from our read on Oct 13, 2026. Peers: 1,162 AI chart posts we hold and 239 from @arena.

Where it sits

Reach against resonance

Each dot is a post. Right is more views, up is a higher engagement rate. The lines are the medians, so the four corners are the four kinds of post.

Among 1,162 AI chart posts we hold

Score #593 of 1,162

Views	123.1K	#344	top 30%
Likes	472	#458	top 39%
Engagement rate	0.43%	#922	bottom 21%
Save rate	0.033%	#968	bottom 17%

Among 239 @arena posts

Score #135 of 239

Views	123.1K	#66	top 27%
Likes	472	#90	top 37%
Engagement rate	0.43%	#190	bottom 21%
Save rate	0.033%	#210	bottom 12%

Growth

Our reads cover 29 hours

Views123.1K

Age at our read15 days

Views per day of life8.1Kviews divided by days since it was posted

Gained between our reads+19views over 29 hours, about 16 a day now

Dots are our reads. The dotted line from the day it was posted to our first read is a gap, not data.

@arena's posts over time

Every post from this account we hold, by date and views. This one is marked; the line is the running median of the last 10.

News · Sep 28, 2026

@arena posts Agent Arena Leaderboard benchmark bar chart

The chart shows a benchmark bar chart for the Agent Arena Leaderboard, with 123K views against a 39.9K median among AI chart posts.

What happened

@arena posted a benchmark bar chart on September 28, 2026, covering the Agent Arena Leaderboard with 13 models shown. It came with 4 other posts from the account that day, including Agent Arena Leaderboard Rankings at 107K views.

The numbers

It reached 123K views, #344 of 1,162 AI chart posts, and #66 of 239 @arena posts. Its score rank was #593 of 1,162 AI chart posts.

The lesson

A 13-model benchmark bar chart drew 123K views but a 0.033% save rate, the 17th percentile among AI chart posts. The chart travelled on views while its save rate sat below the 0.076% median among AI chart posts.

What it means

At #135 of 239 @arena posts by score, this chart's 123K views ran 2.7x the company median of 46.2K. The gap is in saves: 0.033% against the 0.076% median among AI chart posts.

Written by ViralChart from public numbers read on Oct 13, 2026. Every number is checked against our data before it is shown.

Updates: what @arena posted next

Data and API

14 points read off this chart

Estimated from the image 50%

Group	Value	Read
Claude Fable 5.1 (Max)	13.8 %	estimated
GPT-6 Astra 5.5 (High)	12.2 %	estimated
Claude Opus 5 (Max)	9.6 %	estimated
Claude Opus 5 (High)	9.5 %	estimated
GPT-6 Sol (Max)	8.2 %	estimated
Claude Fable Opus 4.8 (High)	8.1 %	estimated
GPT-5.6 Sol (xHigh)	7 %	estimated
Claude Sonnet 5 (High)	6.8 %	estimated
Grok-4.7 (xHigh)	4.8 %	estimated
GPT 5.5 (xHigh)	4.4 %	estimated
Hy4 Preview	4.3 %	estimated
Kimi K3 (Max)	4.3 %	estimated

Showing 12 of 14. All points, the redraw and the maker

Max plan · API

GET https://viral-chart.com/api/posts/019cb4c52153.json
GET https://viral-chart.com/api/charts/019cb4c52153.json
GET https://viral-chart.com/api/charts/019cb4c52153.skill.md

Make one like this Open the post JSON Chart data JSON Skill file API docs

Static files in this prototype. The post JSON holds the public numbers, ranks, score, quadrant, our reads and, when checked, our copy.

API · Max

Use this chart via API

On the Max plan you can pull this chart's numbers with the provenance of each one, as JSON or CSV, with its redraw spec, or call it from an agent over MCP. Chart id 019cb4c52153.

See the Max plan API docs

	Path	Returns	Plan
GET	`/api/v1/charts/019cb4c52153`	Title, publisher, date, form, point count; with a Max key, the data link	Open
GET	`/api/v1/charts/019cb4c52153/data`	Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV	Max
GET	`/api/v1/charts/019cb4c52153/render?view=1`	The draw-only view this page uses	Open
POST	`/mcp`	Tool get_chart_data with this id, for Claude, Cursor and other agents	Max

curlMax

curl -s https://viral-chart.com/api/v1/charts/019cb4c52153/data \
  -H "Authorization: Bearer $VIRALCHART_KEY"

Claude CodeMax

claude mcp add --transport http viralchart https://viral-chart.com/mcp \
  --header "Authorization: Bearer $VIRALCHART_KEY"

60 requests a minute per key; over that you get 429 with Retry-After. Up to 5 keys per account, made on your account page and shown once. Without Max, the data route answers 402 with a link to the plans. The numbers describe a chart its publisher owns, and every file carries a license note.

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