GPTBot vs ClaudeBot vs Bytespider: Comparison

GPTBot vs ClaudeBot vs Bytespider

These three crawlers represent the most significant AI scraping activity on the web today. Each is operated by a different company, behaves differently, and targets different content. Understanding their differences helps you make informed decisions about how to handle each one.

GPTBot (OpenAI)

GPTBot is OpenAI's web crawler, used to gather training data for GPT models and ChatGPT. It identifies itself with the user agent "GPTBot" and OpenAI publishes its IP ranges.

Behavior: GPTBot generally respects robots.txt directives. It crawls at moderate frequencies and focuses on text-heavy pages. Cloudflare data shows GPTBot accessing 28.97% of top websites, with a 305% year-over-year traffic increase.

What it collects: Primarily text content. OpenAI states it does not collect content behind paywalls, personally identifiable information, or content that violates their policies.

Blocking: Add "User-agent: GPTBot" and "Disallow: /" to your robots.txt. Note that this only blocks future crawling — content already collected remains in their training data.

ClaudeBot (Anthropic)

ClaudeBot is Anthropic's web crawler for training Claude models. It uses the user agent "ClaudeBot" (previously "anthropic-ai").

Behavior: ClaudeBot is generally well-behaved and respects robots.txt. Cloudflare reports it accesses 5.4% of top sites, with a declining share as more sites block it. Anthropic provides opt-out mechanisms and publishes IP ranges.

What it collects: Text content for model training. Anthropic has been more transparent than most about their crawling practices and has responded to publisher concerns.

Blocking: Add "User-agent: ClaudeBot" and "Disallow: /" to your robots.txt.

Bytespider (ByteDance)

Bytespider is ByteDance's aggressive web crawler, historically the most prolific AI scraper. It feeds data into TikTok, Lark, and other ByteDance AI products.

Behavior: Bytespider has been documented crawling at extremely high frequencies — Cloudflare data showed it accessing 40.4% of top websites at its peak, often at 20x the rate of OpenAI's crawler. It has since declined to 9.37% as blocking has increased. Bytespider has been documented ignoring robots.txt in some cases.

What it collects: Broad content extraction — text, images, structured data. ByteDance uses this data across multiple AI products.

Blocking: Add "User-agent: Bytespider" and "Disallow: /". Given Bytespider's history of ignoring robots.txt, edge-level blocking is recommended for reliable enforcement.

Comparison table

Respects robots.txt: GPTBot — generally yes. ClaudeBot — yes. Bytespider — inconsistently. Crawl volume: GPTBot — high and growing (+305% YoY). ClaudeBot — moderate and declining. Bytespider — very high, declining from peak. Transparency: GPTBot — moderate (IP ranges published). ClaudeBot — highest (opt-out, IP ranges, policies). Bytespider — lowest. Recommended action: GPTBot — monitor or monetize. ClaudeBot — monitor or monetize. Bytespider — block.

Beyond the big three

Hundreds of other AI crawlers operate across the web — many using generic user agents or no identification at all. Centinel's database tracks 1,600+ unique crawler signatures, including crawlers operated by scraping-as-a-service providers that commercial clients use to bypass your defenses.