Models
Anthropic
Model Detection Performance Comparison

AnthropicX · Oct 29, 2025 · official

Model Detection Performance Comparison

Anthropic's grouped bar chart drew 24.1K views on X: 0.1x its median post and #677 of 1,162 AI chart posts we hold by views. Read Oct 12, 2026.

Correct ID false positive rates for production and H-only models

XData Grouped bar chart Claude Opus 4 All Anthropic modelsOpus 4.1Opus 4Sonnet 4Sonnet 3.7Sonnet 3.5 newSonnet 3.5Haiku 3.5Opus 3

Anthropic: Model Detection Performance Comparison — Published by Anthropic on X, Oct 29, 2025. Source: x.com

44/ 100

ViralChart score

Small but loved

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

#703 of 1,162 AI chart posts we hold · #51 of 56 Anthropic 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 Small but loved quadrant, with a score rank of #703 of 1,162 AI chart posts.

At 24.1K views, this post sits at 0.06x Anthropic's median of 431K, ranking #51 of 56 Anthropic posts.

Its 0.013 views per follower lands in the 7th percentile and the bottom decile across posts with known followers.

A score of 44 places it at #703 of 1,162 AI chart posts and #51 of 56 Anthropic posts.

0.01views per follower

24.1K views from an account with 1.8M followers.

0.1xAnthropic's median post

24.1K views, where Anthropic's typical post gets 431K.

0.3xthe median grouped bar chart post

Across 108 grouped bar chart posts we hold, the median gets 87.5K views.

bottom 43%save rate

0.067% of viewers bookmarked it to come back to. The median post gets 0.076%.

Public X numbers from our read on Oct 12, 2026. Peers: 1,162 AI chart posts we hold and 56 from Anthropic.

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 #703 of 1,162

Views	24.1K	#677	bottom 42%
Likes	178	#670	bottom 42%
Engagement rate	0.79%	#511	top 44%
Save rate	0.067%	#658	bottom 43%

Among 56 Anthropic posts

Score #51 of 56

Views	24.1K	#51	bottom 10%
Likes	178	#49	bottom 13%
Engagement rate	0.79%	#13	top 22%
Save rate	0.067%	#18	top 31%

Growth

One read so far

Views24.1K

Age at our read348 days

Views per day of life69views divided by days since it was posted

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

Anthropic'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 29, 2025

Anthropic posts model detection performance comparison chart

A grouped bar chart on correct ID false positive rates for production and H-only models drew 24.1K views and a 0.79% engagement rate.

What happened

Anthropic published a grouped bar chart on October 29, 2025, comparing correct ID false positive rates for production and H-only models. It was the account's only post that day.

The numbers

The post reached 24.1K views, ranking #677 of 1,162 AI chart posts by views and #51 of 56 Anthropic posts. Its score of 44 ranked #703 of 1,162 AI chart posts.

The lesson

A 10-model grouped bar chart drew 24.1K views against a 39.9K median among AI chart posts. The 0.067% save rate and 0.79% engagement rate show saves stayed low even as engagement held at the median.

What it means

At #51 of 56 Anthropic posts by views and 0.06x the company median of 431K, this chart sits far below the account's typical reach. The 7th percentile views per follower marks it as a bottom-decile post for the 1.8M-follower account.

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

Updates: what Anthropic posted next

Data and API

25 points read off this chart

Estimated from the image 44%

Series	Group	Value	Read
Production Models	Opus 4.1	0.2	estimated
Production Models	Opus 4	0.2	estimated
H-only Models	Opus 4 (H-only)	0.01	estimated
Production Models	Sonnet 4	0.06	estimated
H-only Models	Sonnet 4 (H-only)	-0.12	estimated
Production Models	Sonnet 3.5 new	0.02	estimated
H-only Models	Sonnet 3.5 new (H-only)	0.11	estimated
Production Models	Sonnet 3.5	0.02	estimated
Production Models	Haiku 3.5	0.02	estimated
H-only Models	Haiku 3.5 (H-only)	0.11	estimated
Production Models	Opus 3	0.08	estimated
H-only Models	Opus 3 (H-only)	0.1	estimated

Showing 12 of 25. All points, the redraw and the maker

Max plan · API

GET https://viral-chart.com/api/posts/4d6cda02ea42.json
GET https://viral-chart.com/api/charts/4d6cda02ea42.json
GET https://viral-chart.com/api/charts/4d6cda02ea42.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 4d6cda02ea42.

Approximate values. Our two readings of this chart agreed only in part (confidence 0.44 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/4d6cda02ea42`	Title, publisher, date, form, point count; with a Max key, the data link	Open
GET	`/api/v1/charts/4d6cda02ea42/data`	Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV	Max
GET	`/api/v1/charts/4d6cda02ea42/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/4d6cda02ea42/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.