ChatGPT is not like a classic search engine but it does look into the web. OpenAI has added a search capability to ChatGPT that aggregates web information and shows sources, and it relies on a mix of third-party providers (notably Bing) plus OpenAI’s own crawling/partnerships. This means you can be surfaced even if you’re not #1 on Bing, provided your pages are crawlable and comprehensible to OpenAI’s systems.
OpenAI operates GPTBot, an official web crawler with a documented user-agent and robots.txt controls. Thus if your robots.txt blocks GPTBot, ChatGPT will have a harder time evaluating and citing your content. (Conversely, you can block it if you choose.) Other AI services also have their own bots (e.g., PerplexityBot, ClaudeBot/Anthropic). In this context, managing access via robots.txt is now a core part of AI visibility.
Note: Verify you are allowing GPTBot (and Bing) unless you intentionally opt out. See here for robots.txt templates.
OpenAI has also has inked multi-year content partnerships (e.g., TIME, Condé Nast, News Corp, FT, Vox, AP). While you can’t “sign a deal” overnight, these illustrate that trusted, high-quality sources get elevated incorporation. For independent blogs, the practical takeaway is to signal quality (authorship, references, structured data, etc.) so that AI systems can safely cite you.
Zero-click and AI answers are reshaping discovery. Multiple studies and industry analyses show that a lot of searches now result in no click to external sites. AI overviews raise that share further. Your content must therefore be designed for inclusion in AI summaries (and still compelling when users do click).
GEO makes your content easy for AI systems to find, parse, trust, and cite. That means: structured and clear answers near the top; deep, well-sourced context underneath; and metadata that machines understand (schema, organization, author).
Robots.txt is standardized by RFC 9309. To be eligible for ChatGPT citation, you must not block GPTBot or Bing. If you do block them, your content may be invisible to AI answers. Here’s a safe starting point:
<aside> 👉🏻
User-agent: Bingbot
Allow: /
User-agent: GPTBot
Allow: /
User-agent: ClaudeBot
Allow: /
User-agent: PerplexityBot
Allow: /
User-agent: AhrefsSiteAudit
Disallow: /
</aside>
Note: robots.txt is a policy, not an authentication barrier. Reputable crawlers follow it; abusive ones might not. Nonetheless, it’s the industry norm and referenced by standards.