rlhfbook.com
rlhfbook.com is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-06-19 and last crawled it on 2026-10-20. It resolves to 104.21.23.52. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
RLHF Book: Reinforcement Learning from Human Feedback and LLM Post-Training
A free online book and course on RLHF, preference tuning, reward models, RLVR, and post-training language models.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-06-19 |
| Last crawled | 2026-10-20 |
| IPv4 | 104.21.23.52 |
| IPv6 | 2606:4700:3031::6815:1734 |
| Network | AS13335 Cloudflare, Inc. · United States |
| CNAME | rlhfbook.com |
| Language | en-US |
| Server | cloudflare |