Anthropic ships major Claude updates almost weekly, which makes staying current with the platform a genuine full-time problem — even the best deep-dive guides go stale within weeks of publication. Claude AI: The Complete Guide solves that by treating currency as a feature: every pricing figure, benchmark, and model spec is timestamped, every correction from prior editions is called out explicitly rather than quietly fixed, and this August 2026 revision covers everything from the new Claude Opus 5 to the Fable 5/Mythos 5 export-control saga that briefly took two flagship models offline worldwide. Whether you’re writing your first API call or architecting a production agentic system, this is the rare technical reference built to be re-read as it’s updated, not just read once and left to rot on a shelf.