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AnthropicX · Mar 13, 2026 · official

Long context MRCR v2 retrieval

Anthropic's slope chart drew 5.7M views on X: 13x its median post and #28 of 1,162 AI chart posts we hold by views. Read Oct 13, 2026.

Model performance declines as input context length increases

XDataSlope chartClaude Opus 4.6All Anthropic modelsGPT-5.4Gemini 3.1 ProOpus 4.6Sonnet 4.6Sonnet 4.5
Published by Anthropic on X, Mar 13, 2026. Source: x.com
79/ 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.

#59 of 1,162 AI chart posts we hold · #8 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 #59 of 1,162 AI chart posts by score.

Its 5.7M views are 13x Anthropic's 431K median, ranking #6 of 56 Anthropic posts by views.

A score of 79 places it #59 of 1,162 AI chart posts and #8 of 56 Anthropic posts.

At 3.01 views per follower against a 0.20 median, it sits in the 89th percentile among posts with known followers.

13xAnthropic's median post

5.7M views, where Anthropic's typical post gets 431K.

3.00views per follower

5.7M views from an account with 1.9M followers.

bottom 29%engagement rate

0.51% of viewers liked, reposted, quoted or replied. The median post gets 0.73%.

bottom 36%save rate

0.057% 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 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 #59 of 1,162

Views5.7M#28top 2%
Likes24.6K#8top 1%
Engagement rate0.51%#822bottom 29%
Save rate0.057%#747bottom 36%

Among 56 Anthropic posts

Score #8 of 56

Views5.7M#6top 10%
Likes24.6K#3top 4%
Engagement rate0.51%#34bottom 40%
Save rate0.057%#25top 44%

Growth

Our reads cover 26 hours

Views5.7M
Age at our read214 days
Views per day of life26.7Kviews divided by days since it was posted
Gained between our reads+63views over 26 hours, about 58 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 · Mar 13, 2026 · Lead story

Anthropic's long context MRCR v2 slope chart draws 5.7M views

A single slope chart on March 13, 2026 shows mean match ratio falling as input context length rises, with 5.7M views and a 0.51% engagement rate.

What happened

Anthropic posted one chart on March 13, 2026, a slope chart on long context MRCR v2 retrieval. It was the account's only post that day.

The numbers

The post reached 5.7M views, #28 of 1,162 AI chart posts, and scored 79, #59 of 1,162 AI chart posts. Among Anthropic posts it ranks #6 of 56 by views and #8 of 56 by score.

The lesson

A slope chart with 5 models shown drew 5.7M views, 13x Anthropic's 431K median, but a 0.057% save rate against a 0.51% engagement rate. The chart shows Opus 4.6 (128K) at 91.9% and Gemini 3.1 Pro (256K) at 59.1%.

What it means

At #8 of 56 Anthropic posts by score and #59 of 1,162 AI chart posts, this post's 5.7M views sit far above its 0.057% save rate. The 0.51% engagement rate is below the AI chart median, so the reach and the engagement point in different directions.

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

  1. Opus 4.7 Benchmark Comparison14.1M views
  2. Sycophancy by model63.7K views
  3. Opus 4.8 benchmark comparison15.5M views
  4. Claude model performance in research sessions416K views
  5. Claude Mythos 5 and Fable 5 Benchmark Comparison6.3M views

Data and API

16 points read off this chart

Estimated from the image 40%
SeriesGroupValueRead
Opus 4.6128K91.9 %printed
Sonnet 4.6128K90.6 %printed
Opus 4.5128K10.8 %printed
GPT-5.4128K79.3 %printed
Gemini 3.1 Pro128K71.9 %printed
Gemini 3.1 Pro256K59.1 %printed
GPT-5.4512K39.4 %printed
Opus 4.61M78.3 %printed
Sonnet 4.61M65.1 %printed
Opus 4.51M18.5 %printed
GPT-5.41M36.6 %printed
Gemini 3.1 Pro1M25.9 %printed

Showing 12 of 16. All points, the redraw and the maker

Max plan · API

GET https://viral-chart.com/api/posts/7a1601046199.json
GET https://viral-chart.com/api/charts/7a1601046199.json
GET https://viral-chart.com/api/charts/7a1601046199.skill.md
Make one like thisOpen the post JSONChart data JSONSkill fileAPI 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 7a1601046199.

Approximate values. Our two readings of this chart agreed only in part (confidence 0.40 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 planAPI docs
PathReturnsPlan
GET/api/v1/charts/7a1601046199Title, publisher, date, form, point count; with a Max key, the data linkOpen
GET/api/v1/charts/7a1601046199/dataEvery point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSVMax
GET/api/v1/charts/7a1601046199/render?view=1The draw-only view this page usesOpen
POST/mcpTool get_chart_data with this id, for Claude, Cursor and other agentsMax
curlMax
curl -s https://viral-chart.com/api/v1/charts/7a1601046199/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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Questions people ask

Where does this chart come from?

Anthropic published it on Mar 13, 2026 on X (x.com). We keep it here, with the publisher and date credited as text, so you can study it without leaving.

Can I make a chart like this?

Use the format, not the picture. Open its data page and use Make one like this: it starts from this chart's numbers and takes yours.