6.6%
6.6% of the 34,415 scored census entries across 16 cohorts in the United States pass the test of whether they publish an llms.txt file (EXT-1). A further 8,173 refused the scanner and are not counted.
- Sites
- 2,270 of 34,415 scored sites
- Group
- United States, 16 cohorts pooled
- Distinct addresses
- 32,758 (a site on two rosters is two entries)
- Test
- EXT-1: Do you publish an llms.txt file for coding assistants?
- Edition
- Census Q4 2026, Index 12.1, computed 2026-11-06
- Caveat
- Public rosters, not a random sample of the web; a site on more than one roster counts once in each, and says nothing about sites outside the United States.
How to check
- The group and its sites: United States.
- How the census is run: methodology.
- The figures: summary.json or claims.json.
- Every published figure: all claims for the United States.
Link to this claim: https://readinessindex.io/census/2026-Q4/us/claims/us-llms-txt
Cite as TEN7 Readiness Index Census 2026-Q4
Source reply: Source: TEN7 Readiness Index Census 2026-Q4 (Index 12.1). 16 published cohorts pooled: United States, n = 34,415. Public rosters, not a random sample of the web. Figures are CC BY 4.0. Data: https://readinessindex.io/census/2026-Q4/us/claims/us-llms-txt