# OpenAI — Agent Score

> Score: 59/100 (Grade: F) | Docs: https://platform.openai.com/docs | Checked: April 2, 2026

OpenAI scored 59/100 (F) on Agent Score. 13 of 22 agent-readiness checks passed.

[View full report](https://buildwithfern.com/agent-score/company/platform-openai)
[All companies](https://buildwithfern.com/agent-score/llms.txt)

## Summary

- Total checks: 22
- Passed: 13
- Warnings: 4
- Failed: 4

## Check Results

### content-discoverability

- [warn] llms.txt found but only reachable via cross-host redirect (agents may not follow it)
- [pass] llms.txt follows the proposed structure (H1, blockquote, heading-delimited link sections)
- [pass] llms.txt is 22,408 characters (under 50,000 threshold)
- [pass] All 10 same-origin sampled links resolve (127 total links)
- [pass] 10/10 same-origin sampled links point to markdown content (100%)
- [fail] No llms.txt directive found in any of 5 sampled pages; 5 failed to fetch

### markdown-availability

- [warn] 5/10 sampled pages support .md URLs (50%); inconsistent support
- [warn] Content negotiation partially supported: 4 correct type, 0 wrong type, 6 HTML only

### page-size

- [pass] All 10 sampled pages contain server-rendered content
- [pass] All 5 pages under 50K chars (median 23K, max 25K)
- [pass] All 10 sampled pages convert under 50K chars (median 10K, 16% boilerplate)
- [fail] 5 of 10 sampled pages have content starting past 50% (worst 100%)

### content-structure

- [pass] No tabbed content detected across 10 sampled pages
- [pass] No tabbed content found; header quality check not applicable
- [pass] All 35 code fences properly closed across 6 pages

### url-stability

- [pass] All 10 sampled pages return proper error codes for bad URLs
- [fail] 5 JavaScript redirect(s) detected across 10 sampled pages

### observability

- [skip] No sitemap found; cannot assess llms.txt freshness without a sitemap as ground truth
- [fail] 1 of 5 pages have substantive content differences between markdown and HTML (avg 11% missing)
- [pass] All 11 endpoints have appropriate cache headers

### authentication

- [warn] 5 of 10 sampled pages require authentication (5 accessible)
- [pass] Alternative access detected (public-llms-txt, public-markdown, partial-public-access) for site with 5 auth-gated pages