diff --git a/services/apps/git_integration/src/crowdgit/services/maintainer/bedrock.py b/services/apps/git_integration/src/crowdgit/services/maintainer/bedrock.py
index 4e47f6b8ee..42910f6dfd 100644
--- a/services/apps/git_integration/src/crowdgit/services/maintainer/bedrock.py
+++ b/services/apps/git_integration/src/crowdgit/services/maintainer/bedrock.py
@@ -72,7 +72,7 @@ async def invoke_bedrock(
         )
 
         try:
-            modelId = "us.anthropic.claude-sonnet-4-20250514-v1:0"
+            modelId = "us.anthropic.claude-sonnet-4-5-20250929-v1:0"
             accept = "application/json"
             contentType = "application/json"
             response = await bedrock_client.invoke_model(
diff --git a/services/apps/merge_suggestions_worker/src/workflows/mergeMembersWithLLM.ts b/services/apps/merge_suggestions_worker/src/workflows/mergeMembersWithLLM.ts
index b75e25fad2..e32797c167 100644
--- a/services/apps/merge_suggestions_worker/src/workflows/mergeMembersWithLLM.ts
+++ b/services/apps/merge_suggestions_worker/src/workflows/mergeMembersWithLLM.ts
@@ -1,6 +1,6 @@
 import { continueAsNew, proxyActivities } from '@temporalio/workflow'
 
-import { LLMSuggestionVerdictType, MemberMergeSuggestionTable } from '@crowd/types'
+import { LLMSuggestionVerdictType, LlmModelType, MemberMergeSuggestionTable } from '@crowd/types'
 
 import * as commonActivities from '../activities/common'
 import * as memberActivities from '../activities/memberMergeSuggestions'
@@ -23,8 +23,8 @@ export async function mergeMembersWithLLM(
   args: IProcessMergeMemberSuggestionsWithLLM,
 ): Promise<void> {
   const SUGGESTIONS_PER_RUN = 10
-  const REGION = 'us-east-1'
-  const MODEL_ID = 'us.anthropic.claude-sonnet-4-20250514-v1:0'
+  const REGION = 'us-west-2'
+  const MODEL_ID = LlmModelType.CLAUDE_SONNET_4_5
   const MODEL_ARGS = {
     max_tokens: 2000,
     anthropic_version: 'bedrock-2023-05-31',
diff --git a/services/apps/merge_suggestions_worker/src/workflows/mergeOrganizationsWithLLM.ts b/services/apps/merge_suggestions_worker/src/workflows/mergeOrganizationsWithLLM.ts
index 0db492a789..b25ec911a4 100644
--- a/services/apps/merge_suggestions_worker/src/workflows/mergeOrganizationsWithLLM.ts
+++ b/services/apps/merge_suggestions_worker/src/workflows/mergeOrganizationsWithLLM.ts
@@ -1,6 +1,10 @@
 import { continueAsNew, proxyActivities } from '@temporalio/workflow'
 
-import { LLMSuggestionVerdictType, OrganizationMergeSuggestionTable } from '@crowd/types'
+import {
+  LLMSuggestionVerdictType,
+  LlmModelType,
+  OrganizationMergeSuggestionTable,
+} from '@crowd/types'
 
 import * as commonActivities from '../activities/common'
 import * as organizationActivities from '../activities/organizationMergeSuggestions'
@@ -22,8 +26,8 @@ export async function mergeOrganizationsWithLLM(
   args: IProcessMergeOrganizationSuggestionsWithLLM,
 ): Promise<void> {
   const SUGGESTIONS_PER_RUN = 5
-  const REGION = 'us-east-1'
-  const MODEL_ID = 'us.anthropic.claude-sonnet-4-20250514-v1:0'
+  const REGION = 'us-west-2'
+  const MODEL_ID = LlmModelType.CLAUDE_SONNET_4_5
   const MODEL_ARGS = {
     max_tokens: 2000,
     anthropic_version: 'bedrock-2023-05-31',
diff --git a/services/libs/types/src/enums/llm.ts b/services/libs/types/src/enums/llm.ts
index b95b8dc3c5..c0f0de6113 100644
--- a/services/libs/types/src/enums/llm.ts
+++ b/services/libs/types/src/enums/llm.ts
@@ -3,6 +3,7 @@ export enum LlmModelType {
   CLAUDE_3_5_SONNET_V2 = 'anthropic.claude-3-5-sonnet-20241022-v2:0',
   CLAUDE_3_OPUS = 'anthropic.claude-3-opus-20240229-v1:0',
   CLAUDE_SONNET_4 = 'us.anthropic.claude-sonnet-4-20250514-v1:0',
+  CLAUDE_SONNET_4_5 = 'us.anthropic.claude-sonnet-4-5-20250929-v1:0',
 }
 
 export enum LlmQueryType {
diff --git a/services/libs/types/src/llm.ts b/services/libs/types/src/llm.ts
index 2e79cd2ff3..4400552542 100644
--- a/services/libs/types/src/llm.ts
+++ b/services/libs/types/src/llm.ts
@@ -32,6 +32,7 @@ export const LLM_MODEL_REGION_MAP: Record<LlmModelType, string> = {
   [LlmModelType.CLAUDE_3_5_SONNET]: 'us-east-1',
   [LlmModelType.CLAUDE_3_5_SONNET_V2]: 'us-west-2',
   [LlmModelType.CLAUDE_SONNET_4]: 'us-east-1',
+  [LlmModelType.CLAUDE_SONNET_4_5]: 'us-west-2',
 }
 
 // to estimate costs - these numbers can change
@@ -52,11 +53,15 @@ export const LLM_MODEL_PRICING_MAP: Record<LlmModelType, ILlmPricing> = {
     costPer1000InputTokens: 0.003,
     costPer1000OutputTokens: 0.015,
   },
+  [LlmModelType.CLAUDE_SONNET_4_5]: {
+    costPer1000InputTokens: 0.003,
+    costPer1000OutputTokens: 0.015,
+  },
 }
 
 export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
   [LlmQueryType.MEMBER_ENRICHMENT]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -64,7 +69,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.MEMBER_ENRICHMENT_FIND_RELATED_LINKEDIN_PROFILES]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET_V2,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -72,7 +77,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.MEMBER_ENRICHMENT_SQUASH_MULTIPLE_VALUE_ATTRIBUTES]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET_V2,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -80,7 +85,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.MEMBER_ENRICHMENT_SQUASH_WORK_EXPERIENCES_FROM_MULTIPLE_SOURCES]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET_V2,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -88,7 +93,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.MATCH_MAIN_GITHUB_ORGANIZATION_AND_DESCRIPTION]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET_V2,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -96,7 +101,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.REPO_CATEGORIES]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET_V2,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -104,7 +109,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.REPO_COLLECTIONS]: {
-    modelId: LlmModelType.CLAUDE_3_5_SONNET_V2,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 200000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -112,7 +117,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.MEMBER_BOT_VALIDATION]: {
-    modelId: LlmModelType.CLAUDE_SONNET_4,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 2000,
       anthropic_version: 'bedrock-2023-05-31',
@@ -120,7 +125,7 @@ export const LLM_SETTINGS: Record<LlmQueryType, ILlmSettings> = {
     },
   },
   [LlmQueryType.SELECT_MOST_RELEVANT_DOMAIN]: {
-    modelId: LlmModelType.CLAUDE_SONNET_4,
+    modelId: LlmModelType.CLAUDE_SONNET_4_5,
     arguments: {
       max_tokens: 2000,
       anthropic_version: 'bedrock-2023-05-31',