OpenAI launched GPTBot in August 2023 with a detailed public announcement and transparent documentation. Anthropic's ClaudeBot arrived more quietly, with minimal fanfare. Despite their different introductions, both bots now collectively contribute hundreds of millions of daily requests to the web — and they behave in meaningfully different ways.
After six months of monitoring both crawlers across our honeypot network — 1,200 domains spanning 14 content categories — we've identified systematic differences in their crawling philosophies, content preferences, and timing patterns.
- Crawls broadly, shallowly
- Prefers API docs, technical content
- ~1.1s average crawl delay
- 65M estimated daily requests
- 98.2% robots.txt compliance
- Low re-crawl frequency
- Crawls narrower, deeper
- Prefers long-form articles
- ~2.8s average crawl delay
- 41M estimated daily requests
- 97.9% robots.txt compliance
- High re-crawl frequency
Crawl Breadth vs. Depth
The most striking difference is strategic orientation. GPTBot appears optimized for maximum coverage — it visits more unique domains, spends less time per page, and rarely returns to previously crawled content unless a sitemap update signals new material. In our network, GPTBot visited 94% of available URLs within the first two weeks of initial indexing.
ClaudeBot, by contrast, exhibits a quality-over-quantity approach. It visits fewer unique domains per unit time, but spends substantially more time on high-quality pages. In our analysis, ClaudeBot re-crawled pages scoring above 0.8 on our text quality metric an average of 6.2 times over six months, versus 1.4 times for GPTBot.
📌 This difference likely reflects Anthropic's Constitutional AI approach — prioritizing high-quality, diverse, and safe training data over raw volume.
Content Preferences
| Content Type | GPTBot Preference | ClaudeBot Preference |
|---|---|---|
| API / Technical Docs | +52% vs. baseline | +19% vs. baseline |
| Long-form Articles (>2,000 words) | +11% | +47% |
| Academic / Scientific Text | +18% | +31% |
| News Articles | +9% | +22% |
| Code Repositories / Snippets | +38% | +14% |
| Forum / Q&A (Stack Overflow style) | +29% | +8% |
| Product Listings / eCommerce | +4% | -11% |
Timing Patterns
GPTBot: Consistent, Round-the-Clock
GPTBot distributes its crawling activity remarkably uniformly across the 24-hour cycle — a signature of datacenter-scale infrastructure with global distribution. Peak-to-trough variation is only 1.3× across US server time zones, suggesting active load balancing across geographic crawler pools.
ClaudeBot: Off-Peak Concentration
ClaudeBot shows a different pattern: 62% of observed requests arrive between 02:00–08:00 UTC, with a pronounced trough during US business hours. This could reflect deliberate off-peak scheduling to reduce load on target servers (consistent with their more conservative crawl delay) or a more centralized infrastructure with a single-timezone operation profile.
What This Means for Site Owners
For sites focused on technical documentation and developer content, GPTBot is likely your primary visitor. For publishers of long-form editorial content, expect ClaudeBot to return repeatedly, effectively treating your best content as ongoing training signal rather than a one-time harvest.
Both crawlers can be selectively blocked via robots.txt using their respective user-agent tokens: GPTBot and
ClaudeBot.
Note that blocking OpenAI's crawler will also exclude your content from ChatGPT's Browsing feature in
addition to training.