How many CR 9 monsters are in the D&D 5e SRD?

8 CR 9 monsters appear in the SRD 5.2.1 — Bone Devil, Clay Golem, Cloud Giant, Fire Giant, Glabrezu, and others.

How much XP is a CR 9 monster worth?

A CR 9 monster is worth 5,000 XP per the SRD's Experience Points by Challenge Rating table.

D&D 5e SRD · Challenge Rating

CR 9 monsters

8 monsters at Challenge Rating 9 — worth 5,000 XP each (40,000 XP combined). Click into any of them to roll attacks, damage, and saves straight from the stat block.

Name	Type	Size	HP	AC
Bone Devil	Fiend (Devil)	Large	161	16
Clay Golem	Construct	Large	123	14
Cloud Giant	Giant	Huge	200	14
Fire Giant	Giant	Huge	162	18
Glabrezu	Fiend (Demon)	Large	189	17
Treant	Plant	Huge	138	16
Young Blue Dragon	Dragon (Chromatic)	Large	152	18
Young Silver Dragon	Dragon (Metallic)	Large	168	18

Stat blocks from the System Reference Document 5.2.1 © Wizards of the Coast LLC, used under the Creative Commons Attribution 4.0 license.