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The Em Dash Report

AI labs

Anthropic

www.anthropic.com · 421 posts · 590k words · May 2021 to Aug 2026

56 of 64 months in that span carried a post, 8 none. 1 loaded without countable prose.

Per 1k words, 2024–now

4.59

Per 1k words, 2018–2022

0.56

Em dashes counted

2,553

Posts with at least one

76%

Em dashes per post

Monthly0.00
12-month average8.66
Anthropic, latest month in the corpus

By year

En dashes are counted alongside as a control: if em dashes climb while en dashes hold flat, that is a change in writing style rather than a change in typography.

YearPostsEm dashesPer 1k words
20261521,3584.88
20251519504.77
2024602072.95
202343360.95
20221220.57
2021300.00