# Notable AI crawlers

The same facts as the [HTML version](/formats/semantic), served as `text/markdown`.

**Format marker:** FMT-MDN-9W6H

## GPTBot
Operated by OpenAI. Primary purpose: Training & grounding. Honours robots.txt.

## ClaudeBot
Operated by Anthropic. Primary purpose: Model training. Honours robots.txt.

## PerplexityBot
Operated by Perplexity. Primary purpose: Live cited answers. Honours robots.txt.