diff --git a/org-formation/organization.yaml b/org-formation/organization.yaml
index 1ce707f7..00091a2b 100644
--- a/org-formation/organization.yaml
+++ b/org-formation/organization.yaml
@@ -117,6 +117,7 @@ Organization:
         - !Ref SynapseDevAccount
         - !Ref SynapseDWAccount
         - !Ref SynapseProdAccount
+        - !Ref SynapseLlmDevAccount
 
   BridgeOU:
     Type: OC::ORG::OrganizationalUnit
@@ -619,6 +620,20 @@ Organization:
         budget-alarm-threshold: 2000
         budget-alarm-threshold-email-recipient: aws-openchallenges-prod@sagebase.org
 
+# Synapse Large Language Model dev account: hosts development Bedrock-related resources
+  SynapseLlmDevAccount:
+    Type: OC::ORG::Account
+    Properties:
+      AccountName: org-sagebase-synapsellm-dev
+      RootEmail: aws-synapsellm-dev@sagebase.org
+      Alias: org-sagebase-synapsellm-dev
+      Tags:
+        <<: !Include ./_default_org_tags.yaml
+        AccountOwner: it@sagebase.org
+        CostCenter: NO PROGRAM / 000000
+        budget-alarm-threshold: 2000
+        budget-alarm-threshold-email-recipient: aws-synapsellm-dev@sagebase.org
+
   #------------ Personal Accounts -----------
   BuA2aDwAccount:
     Type: OC::ORG::Account