Models
Anthropic
AI model ECI scores by category

@EpochAIResearchX · Oct 1, 2026

AI model ECI scores by category

@EpochAIResearch's benchmark bar chart drew 6.1K views on X: 1.2x @epochairesearch's median post and #905 of 1,162 AI chart posts we hold by views. Read Oct 13, 2026.

Claude Opus 5.5 leads on software engineering, GPT-6 Astra on math

XData Benchmark bar chart Claude Sonnet 5 All Anthropic models GPT-6 AstraClaude Opus 5.5Claude Sonnet 5.5Claude Fable 5.1

@EpochAIResearch: AI model ECI scores by category — Published by @EpochAIResearch on X, Oct 1, 2026. Source: x.com

37/ 100

ViralChart score

Small but loved

Fewer views than the median post but a higher engagement rate: a smaller crowd that acted on it.

#796 of 1,162 AI chart posts we hold · #33 of 59 @epochairesearch 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 Small but loved quadrant, with a score rank of #796 of 1,162 AI chart posts.

Its 1.28% engagement rate sits at the 87th percentile among AI chart posts, against a 0.73% median.

It ranked #2 of 2 posts from this account that day by views.

Its score of 37 ranks #796 of 1,162 AI chart posts.

0.1xthe median benchmark bar chart post

Across 215 benchmark bar chart posts we hold, the median gets 44.4K views.

top 13%engagement rate

1.28% of viewers liked, reposted, quoted or replied. The median post gets 0.73%.

2posts from @epochairesearch that day

Part of a run of 2 posts on Oct 1, 2026. This one was #2 of 2 by views that day.

bottom 43%save rate

0.066% of viewers bookmarked it to come back to. The median post gets 0.076%.

Public X numbers from our read on Oct 13, 2026. Peers: 1,162 AI chart posts we hold and 59 from @epochairesearch.

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 #796 of 1,162

Views	6.1K	#905	bottom 22%
Likes	72	#810	bottom 30%
Engagement rate	1.28%	#155	top 13%
Save rate	0.066%	#664	bottom 43%

Among 59 @epochairesearch posts

Score #33 of 59

Views	6.1K	#25	top 42%
Likes	72	#28	top 47%
Engagement rate	1.28%	#32	bottom 47%
Save rate	0.066%	#48	bottom 19%

Growth

Our reads cover 27 hours

Views6.1K

Age at our read12 days

Views per day of life502views divided by days since it was posted

Gained between our reads+15views over 27 hours, about 14 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.

@epochairesearch'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 · Oct 1, 2026

@EpochAIResearch posts AI model ECI scores by category

A benchmark bar chart showing AI model ECI scores by category drew 6.1K views and a 1.28% engagement rate.

What happened

@EpochAIResearch posted a benchmark bar chart on October 1, 2026, showing AI model ECI scores by category. It came with ubs from the same account that day, including a Claude Opus 5.5 ECI trend post.

The numbers

It reached 6.1K views, ranking #905 of 1,162 AI chart posts. Its score of 37 ranked #796 of 1,162 AI chart posts and #33 of 59 @EpochAIResearch posts.

The lesson

At 1.28%, this post's engagement rate beat the 0.73% median among AI chart posts. A benchmark bar chart with 4 models shown can hold attention even when views are modest.

What it means

This post's 1.28% engagement rate is below @EpochAIResearch's own 1.37% median, while its 6.1K views trail the 39.9K median among AI chart posts. The gap between its #33 of 59 account rank and its #796 of 1,162 overall rank shows the account's chart posts travel differently.

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

Updates: what @epochairesearch posted next

Data and API

11 points read off this chart

Estimated from the image 50%

Series	Group	Value	Read
Claude Opus 5.5	General ECI	167	estimated
Claude Sonnet 5.5	General ECI	165	estimated
Claude Fable 5.1	General ECI	165	estimated
Claude Opus 5.5	Math ECI	168	estimated
GPT-6 Astra	Math ECI	170	estimated
Claude Sonnet 5.5	Math ECI	164	estimated
Claude Fable 5.1	Math ECI	166	estimated
Claude Opus 5.5	SWE ECI	167	estimated
GPT-6 Astra	SWE ECI	165	estimated
Claude Sonnet 5.5	SWE ECI	166	estimated
Claude Fable 5.1	SWE ECI	166	estimated

Max plan · API

GET https://viral-chart.com/api/posts/1a4a01add2d6.json
GET https://viral-chart.com/api/charts/1a4a01add2d6.json
GET https://viral-chart.com/api/charts/1a4a01add2d6.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 1a4a01add2d6.

See the Max plan API docs

	Path	Returns	Plan
GET	`/api/v1/charts/1a4a01add2d6`	Title, publisher, date, form, point count; with a Max key, the data link	Open
GET	`/api/v1/charts/1a4a01add2d6/data`	Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV	Max
GET	`/api/v1/charts/1a4a01add2d6/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/1a4a01add2d6/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.