diff --git a/chat.go b/chat.go
index 9719f6b92..8ec747889 100644
--- a/chat.go
+++ b/chat.go
@@ -88,10 +88,17 @@ const (
 	ChatMessagePartTypeImageURL ChatMessagePartType = "image_url"
 )
 
+// CacheControlConfig for anthropic prompt cache control.
+type CacheControlConfig struct {
+	Type string `json:"type,omitempty"`
+	TTL  string `json:"ttl,omitempty"`
+}
+
 type ChatMessagePart struct {
-	Type     ChatMessagePartType  `json:"type,omitempty"`
-	Text     string               `json:"text,omitempty"`
-	ImageURL *ChatMessageImageURL `json:"image_url,omitempty"`
+	Type         ChatMessagePartType  `json:"type,omitempty"`
+	Text         string               `json:"text,omitempty"`
+	ImageURL     *ChatMessageImageURL `json:"image_url,omitempty"`
+	CacheControl *CacheControlConfig  `json:"cache_control,omitempty"`
 }
 
 type ChatCompletionMessage struct {
@@ -344,8 +351,9 @@ const (
 )
 
 type Tool struct {
-	Type     ToolType            `json:"type"`
-	Function *FunctionDefinition `json:"function,omitempty"`
+	Type         ToolType            `json:"type"`
+	Function     *FunctionDefinition `json:"function,omitempty"`
+	CacheControl *CacheControlConfig `json:"cache_control,omitempty"`
 }
 
 type ToolChoice struct {
diff --git a/common.go b/common.go
index d1936d656..267f33076 100644
--- a/common.go
+++ b/common.go
@@ -9,6 +9,7 @@ type Usage struct {
 	TotalTokens             int                      `json:"total_tokens"`
 	PromptTokensDetails     *PromptTokensDetails     `json:"prompt_tokens_details"`
 	CompletionTokensDetails *CompletionTokensDetails `json:"completion_tokens_details"`
+	CacheReadInputTokens    int                      `json:"cache_read_input_tokens"`
 }
 
 // CompletionTokensDetails Breakdown of tokens used in a completion.