Models
Anthropic
Pareto Frontier for Agent Arena

@arenaX · Aug 19, 2026

Pareto Frontier for Agent Arena

@arena's scatter plot drew 48.1K views on X: 1.0x its median post and #545 of 1,162 AI chart posts we hold by views. Read Oct 12, 2026.

Pareto frontier of AI models by cost and performance

XData Scatter plot Claude Opus 5 All Anthropic models Kimi K3GPT 5.5GLM 5.2GPT 5.6 LunaGrok 4.5Mimo V2.5 Pro

@arena: Pareto Frontier for Agent Arena — Published by @arena on X, Aug 19, 2026. Source: x.com

50/ 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.

#630 of 1,162 AI chart posts we hold · #151 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

The post sits in the Wide but thin quadrant at #630 of 1,162 AI chart posts.

Its save rate of 0.11% sits at the 68th percentile among AI chart posts, above the 0.076% median.

The scatter plot drew 48.1K views against a 22.4K median for this type, a 2.1x ratio.

The score of 50 lands at #630 of 1,162 AI chart posts and #151 of 239 @arena posts.

0.21views per follower

48.1K views from an account with 234.1K followers.

top 32%save rate

0.110% of viewers bookmarked it to come back to. The median post gets 0.076%.

2.1xthe median scatter plot post

Across 187 scatter plot posts we hold, the median gets 22.4K views.

bottom 32%engagement rate

0.54% of viewers liked, reposted, quoted or replied. The median post gets 0.73%.

Public X numbers from our read on Oct 12, 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 #630 of 1,162

Views	48.1K	#545	top 47%
Likes	210	#637	bottom 45%
Engagement rate	0.54%	#785	bottom 32%
Save rate	0.110%	#372	top 32%

Among 239 @arena posts

Score #151 of 239

Views	48.1K	#117	top 49%
Likes	210	#152	bottom 37%
Engagement rate	0.54%	#155	bottom 35%
Save rate	0.110%	#60	top 25%

Growth

Our reads cover 6 hours

Views48.1K

Age at our read54 days

Views per day of life889views divided by days since it was posted

Gained between our reads+0views over 6 hours, about 0 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 · Aug 19, 2026

@arena posts Pareto Frontier for Agent Arena scatter plot

A scatter plot of AI models by cost and performance drew 48.1K views and a 0.54% engagement rate on August 19, 2026.

What happened

@arena posted a scatter plot titled Pareto Frontier for Agent Arena on August 19, 2026. It was the account's only post that day.

The numbers

It reached 48.1K views, #545 of 1,162 AI chart posts, against a 39.9K median among AI chart posts. Its score of 50 ranks #630 of 1,162 AI chart posts.

The lesson

A scatter plot at 2.1x the median views for its type still posted a 0.54% engagement rate against a 0.78% median for that type. The 0.11% save rate, at the 68th percentile, is the number that held above the median.

What it means

At #151 of 239 @arena posts, this chart sits below the account's own score rank pattern while its 0.11% save rate clears the 0.076% median among AI chart posts. The 48.1K views against a 0.54% engagement rate leave the reach and the response apart.

Written by ViralChart from public numbers read on Oct 12, 2026. Every number is checked against our data before it is shown.

Updates: what @arena posted next

Data and API

13 points read off this chart

Estimated from the image 30%

Series	Group	Value	Read
Frontier	Pareto Frontier	10 %	estimated
Frontier	Pareto Frontier	7.5 %	estimated
Frontier	Pareto Frontier	5 %	estimated
Frontier	Pareto Frontier	3 %	estimated
Frontier	Pareto Frontier	1 %	estimated
Frontier	Pareto Frontier	0 %	estimated
Claude Opus 5	Models	10 %	estimated
Kimi K3	Models	7.5 %	estimated
GPT 5.5	Models	5 %	estimated
GPT 5.5	Models	3 %	estimated
GLM 5.2	Models	1 %	estimated
GPT 5.6 Luna	Models	0 %	estimated

Showing 12 of 13. All points, the redraw and the maker

Max plan · API

GET https://viral-chart.com/api/posts/e5f51998c6fb.json
GET https://viral-chart.com/api/charts/e5f51998c6fb.json
GET https://viral-chart.com/api/charts/e5f51998c6fb.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 e5f51998c6fb.

Approximate values. Our two readings of this chart agreed only in part (confidence 0.30 of 1), so check the original before you quote a number. The API marks it lowConfidence, and ?min_confidence=0.5 leaves it out.

See the Max plan API docs

	Path	Returns	Plan
GET	`/api/v1/charts/e5f51998c6fb`	Title, publisher, date, form, point count; with a Max key, the data link	Open
GET	`/api/v1/charts/e5f51998c6fb/data`	Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV	Max
GET	`/api/v1/charts/e5f51998c6fb/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/e5f51998c6fb/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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