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Anthropic
Indexed cost of Fable usage

AnthropicX · Sep 1, 2026 · official

Indexed cost of Fable usage

Anthropic's grouped bar chart drew 694.6K views on X: 1.6x its median post and #124 of 1,162 AI chart posts we hold by views. Read Oct 13, 2026.

Indexed cost of Fable usage for typical and highly agentic workloads

XData Grouped bar chart Claude Fable 5 All Anthropic modelsFable 5Fable 5.1

Anthropic: Indexed cost of Fable usage — Published by Anthropic on X, Sep 1, 2026. Source: x.com

68/ 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.

#263 of 1,162 AI chart posts we hold · #31 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 Wide but thin quadrant, at #263 of 1,162 AI chart posts.

Its save rate of 0.025% sits at the 13th percentile among AI chart posts, below the 0.076% median.

A score of 68 places it at #263 of 1,162 AI chart posts and #31 of 56 Anthropic posts.

It was #2 of 3 posts from this account that day, a level launch-day position.

7.9xthe median grouped bar chart post

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

bottom 13%save rate

0.025% of viewers bookmarked it to come back to. The median post gets 0.076%.

3posts from Anthropic that day

Part of a run of 3 posts on Sep 1, 2026. This one was #2 of 3 by views that day.

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 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 #263 of 1,162

Views	694.6K	#124	top 11%
Likes	2.7K	#109	top 9%
Engagement rate	0.43%	#918	bottom 21%
Save rate	0.025%	#1,017	bottom 13%

Among 56 Anthropic posts

Score #31 of 56

Views	694.6K	#22	top 38%
Likes	2.7K	#23	top 40%
Engagement rate	0.43%	#39	bottom 31%
Save rate	0.025%	#48	bottom 15%

Growth

Our reads cover 27 hours

Views694.6K

Age at our read42 days

Views per day of life16.5Kviews divided by days since it was posted

Gained between our reads+34views over 27 hours, about 30 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.

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 · Sep 1, 2026

Anthropic posts indexed Fable cost chart

The grouped bar chart shows indexed cost for Fable 5 and Fable 5.1 across typical and highly agentic workloads.

What happened

Anthropic published a grouped bar chart on September 1, 2026, on indexed cost of Fable usage. It came with 2 other posts from this account that day.

The numbers

It reached 695K views, #124 of 1,162 AI chart posts, against a median of 39.9K. Its score of 68 ranks #263 of 1,162 AI chart posts and #31 of 56 Anthropic posts.

The lesson

At a 0.025% save rate, 13th percentile among AI chart posts, this chart was viewed more than kept. A grouped bar chart of 2 models drew 695K views but a save rate below the 0.076% median.

What it means

Its #31 of 56 Anthropic posts and #263 of 1,162 AI chart posts put it above the middle of both groups, while its 0.025% save rate sits below the 0.076% median. The gap between 695K views and a 13th percentile save rate is the measured shape of this post.

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

Updates: what Anthropic posted next

Data and API

12 points read off this chart

Estimated from the image 37%

Series	Group	Value	Read
Fable 5	Typical workload	100 index	printed
Fable 5.1	Typical workload	75 index	printed
Fable 5	Highly agentic workload	100 index	printed
Fable 5.1	Highly agentic workload	55 index	printed
Cache reads	Typical workload - Fable 5	40 index	estimated
Cache reads	Typical workload - Fable 5.1	10 index	estimated
Cache reads	Highly agentic workload - Fable 5	60 index	estimated
Cache reads	Highly agentic workload - Fable 5.1	10 index	estimated
All other tokens	Typical workload - Fable 5	60 index	estimated
All other tokens	Typical workload - Fable 5.1	65 index	estimated
All other tokens	Highly agentic workload - Fable 5	40 index	estimated
All other tokens	Highly agentic workload - Fable 5.1	45 index	estimated

Max plan · API

GET https://viral-chart.com/api/posts/a0349eea6b38.json
GET https://viral-chart.com/api/charts/a0349eea6b38.json
GET https://viral-chart.com/api/charts/a0349eea6b38.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 a0349eea6b38.

Approximate values. Our two readings of this chart agreed only in part (confidence 0.37 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/a0349eea6b38`	Title, publisher, date, form, point count; with a Max key, the data link	Open
GET	`/api/v1/charts/a0349eea6b38/data`	Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV	Max
GET	`/api/v1/charts/a0349eea6b38/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/a0349eea6b38/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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