diff --git a/relay/channel/aws/constants.go b/relay/channel/aws/constants.go
index 5ac7ce99..45112d23 100644
--- a/relay/channel/aws/constants.go
+++ b/relay/channel/aws/constants.go
@@ -16,6 +16,7 @@ var awsModelIDMap = map[string]string{
 	"claude-sonnet-4-20250514":   "anthropic.claude-sonnet-4-20250514-v1:0",
 	"claude-opus-4-20250514":     "anthropic.claude-opus-4-20250514-v1:0",
 	"claude-opus-4-1-20250805":   "anthropic.claude-opus-4-1-20250805-v1:0",
+	"claude-sonnet-4-5-20250929": "anthropic.claude-sonnet-4-5-20250929-v1:0",
 	// Nova models
 	"nova-micro-v1:0":   "amazon.nova-micro-v1:0",
 	"nova-lite-v1:0":    "amazon.nova-lite-v1:0",
@@ -69,6 +70,11 @@ var awsModelCanCrossRegionMap = map[string]map[string]bool{
 	"anthropic.claude-opus-4-1-20250805-v1:0": {
 		"us": true,
 	},
+	"anthropic.claude-sonnet-4-5-20250929-v1:0": {
+		"us": true,
+		"ap": true,
+		"eu": true,
+	},
 	// Nova models - all support three major regions
 	"amazon.nova-micro-v1:0": {
 		"us":   true,
diff --git a/relay/channel/claude/constants.go b/relay/channel/claude/constants.go
index a23543d2..d0b36fe4 100644
--- a/relay/channel/claude/constants.go
+++ b/relay/channel/claude/constants.go
@@ -19,6 +19,8 @@ var ModelList = []string{
 	"claude-opus-4-20250514-thinking",
 	"claude-opus-4-1-20250805",
 	"claude-opus-4-1-20250805-thinking",
+	"claude-sonnet-4-5-20250929",
+	"claude-sonnet-4-5-20250929-thinking",
 }
 
 var ChannelName = "claude"
diff --git a/relay/channel/vertex/adaptor.go b/relay/channel/vertex/adaptor.go
index a424cb1a..91a7f88c 100644
--- a/relay/channel/vertex/adaptor.go
+++ b/relay/channel/vertex/adaptor.go
@@ -37,6 +37,7 @@ var claudeModelMap = map[string]string{
 	"claude-sonnet-4-20250514":   "claude-sonnet-4@20250514",
 	"claude-opus-4-20250514":     "claude-opus-4@20250514",
 	"claude-opus-4-1-20250805":   "claude-opus-4-1@20250805",
+	"claude-sonnet-4-5-20250929": "claude-sonnet-4-5@20250929",
 }
 
 const anthropicVersion = "vertex-2023-10-16"
diff --git a/setting/ratio_setting/cache_ratio.go b/setting/ratio_setting/cache_ratio.go
index 5993cdee..8e4b227a 100644
--- a/setting/ratio_setting/cache_ratio.go
+++ b/setting/ratio_setting/cache_ratio.go
@@ -52,6 +52,8 @@ var defaultCacheRatio = map[string]float64{
 	"claude-opus-4-20250514-thinking":     0.1,
 	"claude-opus-4-1-20250805":            0.1,
 	"claude-opus-4-1-20250805-thinking":   0.1,
+	"claude-sonnet-4-5-20250929":          0.1,
+	"claude-sonnet-4-5-20250929-thinking": 0.1,
 }
 
 var defaultCreateCacheRatio = map[string]float64{
@@ -69,6 +71,8 @@ var defaultCreateCacheRatio = map[string]float64{
 	"claude-opus-4-20250514-thinking":     1.25,
 	"claude-opus-4-1-20250805":            1.25,
 	"claude-opus-4-1-20250805-thinking":   1.25,
+	"claude-sonnet-4-5-20250929":          1.25,
+	"claude-sonnet-4-5-20250929-thinking": 1.25,
 }
 
 //var defaultCreateCacheRatio = map[string]float64{}
diff --git a/setting/ratio_setting/model_ratio.go b/setting/ratio_setting/model_ratio.go
index 887c5bd5..2244593a 100644
--- a/setting/ratio_setting/model_ratio.go
+++ b/setting/ratio_setting/model_ratio.go
@@ -141,6 +141,7 @@ var defaultModelRatio = map[string]float64{
 	"claude-3-7-sonnet-20250219":                1.5,
 	"claude-3-7-sonnet-20250219-thinking":       1.5,
 	"claude-sonnet-4-20250514":                  1.5,
+	"claude-sonnet-4-5-20250929":                1.5,
 	"claude-3-opus-20240229":                    7.5, // $15 / 1M tokens
 	"claude-opus-4-20250514":                    7.5,
 	"claude-opus-4-1-20250805":                  7.5,