openai.com scores 20/100 on AI visibility. Here's the wall it hit.

Our hourly GEO Pulse probe scored openai.com 20/100 — "largely invisible" on July 12, 2026. Not because of robots.txt: that file politely allows GPTBot, ClaudeBot and PerplexityBot. Because the homepage answered our fetch with HTTP 403 — a wall at the WAF layer that robots.txt never mentions.

This is the first note in our lab notebook: short, dated, built on our own probes. Every claim below comes from a logged run you can reproduce with the free checker .

What the probe actually saw

The five-signal breakdown, verbatim from the run:

• AI-crawler reachability — FAIL. "Homepage returned HTTP 403 — a block or server error, not readable content."
• GPTBot / ClaudeBot access — PASS. "No blanket Disallow for the major AI crawlers."
• llms.txt — FAIL. No /llms.txt on the root domain.
• JSON-LD schema and answer-first structure — FAIL, because a page you can't read is a page you can't parse.

Why does robots.txt pass while the site blocks bots?

Because they are enforced in different places. robots.txt is a promise; the WAF is a bouncer. openai.com promises entry and then the bouncer turns automated user-agents away at the door. A review of a few thousand business sites found about 27% blocking at least one major LLM crawler — usually by accident, at the CDN or WAF layer, invisible in robots.txt. The pattern is common enough that it's the first thing our AI crawler playbook tells you to verify.

Does this hurt OpenAI? Barely — ChatGPT reaches OpenAI's content through its own pipelines, and every engine knows who they are. That's exactly the point: they can afford a 403. You can't. If your homepage answers 403 to a retrieval bot, you're simply absent from the answer pool, and no amount of schema or content work scores a single point behind that wall.

The rest of the board

Elsewhere on the July 12 sweep: cloudflare.com and stripe.com hold 100/100, vercel.com sits at 93, and anthropic.com lands at 65 — its root domain ships no llms.txt either, even though docs.anthropic.com carries one of the biggest llms.txt files we've torn down . The full board updates hourly on the homepage .

Want your own number? The checker runs the same five probes in about 20 seconds — and if it surprises you, the audit ladder starts at $49 .