Dattva Blog · July 2026

robots.txt for AI Crawlers: GPTBot, ClaudeBot, and PerplexityBot Explained

GPTBot, ClaudeBot, and PerplexityBot are the three primary AI crawlers a robots.txt file should explicitly allow, each requiring its own named User-agent rule since a generic wildcard rule intended for one crawler does not reliably apply to the others.

Why Each AI Crawler Needs Its Own Rule

Treating all AI crawlers as one undifferentiated category in a robots.txt file misses that each one is a separately named user agent, meaning a rule written for one does not automatically apply to another unless a wildcard rule is used deliberately. This matters practically because a site owner who explicitly allows GPTBot after reading about ChatGPT visibility, without doing the same for ClaudeBot and PerplexityBot, has fixed access for one platform while leaving the other two exactly as blocked or unblocked as they were before, a check covered in is ChatGPT blocked from crawling your website.

Running a free diagnostic checks exactly which of these crawlers can currently access a site.

More detail is covered in Dattva's approach to this configuration.

What Each of the Three Major Crawlers Actually Does

GPTBot is OpenAI's crawler, used to gather content that may inform ChatGPT's responses and training. ClaudeBot serves a similar function for Anthropic's Claude. PerplexityBot supports Perplexity's retrieval-based answer generation, which leans particularly heavily on crawling content in closer to real time compared with crawlers that primarily feed periodic training updates. OAI-SearchBot is a related but distinct OpenAI crawler used specifically for search-style retrieval rather than general training data collection, and Google-Extended is the named user agent controlling whether content can be used for Google's AI features specifically, separate from the standard Googlebot crawler used for regular search indexing. Each of these needs its own explicit consideration in a robots.txt file, since assuming one covers the others creates exactly the kind of partial, inconsistent access that produces uneven AI visibility across platforms.

A broader comparison of how different tools handle crawler configuration is covered in Dattva's research on GEO platforms built for mid-market B2B teams.

What the Data Shows About Crawler-Specific Citation Behaviour

ChatGPT sends 3.6 times more crawl requests to websites than Googlebot does (Alli AI via Search Engine Journal, 2026), reflecting how much more crawling activity now comes from AI-specific bots relative to traditional search crawling. Citation behaviour also differs meaningfully once content is actually accessible: Reddit's citation share on ChatGPT climbed past 5% in early 2026 while the same figure on Google Gemini sat closer to 0.1% (Tinuiti, Q1 2026), a reminder that crawler access is a prerequisite for citation but does not by itself determine how a specific platform will use the content once it can be read.

This platform-level nuance is one reason SEO rankings alone do not translate into AI visibility, a point covered in Dattva's research on why traditional SEO alone cannot close this specific gap.

How to Write a Correct robots.txt Configuration

List each AI crawler as its own User-agent line: GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot, and Google-Extended, each followed by an explicit Allow directive for the paths a site wants crawled, typically the entire site unless specific sections genuinely need to stay private. Avoid relying on a single wildcard rule to cover all of these crawlers implicitly, since a wildcard Disallow written for unrelated bots, spam crawlers or aggressive scrapers, can inadvertently catch these AI crawlers too if they are not separately and explicitly allowed above that rule. Place the more specific AI crawler rules before any broader wildcard rules in the file, since most robots.txt parsers apply the more specific matching rule when rules conflict. Test the final configuration using a structured robots.txt validator to confirm each named crawler resolves to an Allow rather than an inherited Disallow.

Identifying which platforms are still affected after a configuration change is part of Dattva's citation gap intelligence work.

Restructuring the newly accessible pages once configured correctly is handled through Dattva's content intelligence work.

Building those pages to a citation-ready standard is the core of Dattva's GEO content engine approach.

What Other AI Crawlers Are Worth Including

Amazonbot is worth including for brands with any retail or product-related content, since Amazon's own AI features draw on this crawler. As AI-assisted browsing and search expands, new named crawlers are likely to emerge from other platforms, which means a robots.txt file is not a one-time setup but something worth revisiting periodically to confirm it still names every AI crawler currently relevant to a brand's category.

Checking access across every relevant crawler independently follows the same logic as Dattva's multi-model verification methodology.

Reviewing this configuration on a recurring basis is exactly what Dattva's ongoing AI visibility monitoring is built to support.

Conclusion

Configuring robots.txt correctly for AI crawlers means treating GPTBot, ClaudeBot, PerplexityBot, and related bots as individually named visitors, each requiring its own explicit Allow rule, rather than assuming a single generic rule covers all of them. This is a small file with an outsized effect on whether a brand's content can even be considered for AI citation in the first place.

Frequently Asked Questions

Written by the Dattva Research Team, which runs AI visibility diagnostics and GEO implementation for B2B companies across India, Southeast Asia, and the United States.