diff --git a/model/api.go b/model/api.go
index 44834a2..8d02d07 100644
--- a/model/api.go
+++ b/model/api.go
@@ -22,7 +22,7 @@ type Requester interface {
 }
 
 type Cloner interface {
-	Clone() Cloner
+	Clone() Protocol
 }
 
 type MessageBuilder[T any] interface {
diff --git a/model/genai.go b/model/genai.go
index 4984fa3..9c51c19 100644
--- a/model/genai.go
+++ b/model/genai.go
@@ -189,7 +189,7 @@ func (opai *GenAI) Assistant(prompt ...Content) Protocol {
 	return opai
 }
 
-func (opai *GenAI) Clone() Cloner {
+func (opai *GenAI) Clone() Protocol {
 	x := new(GenAI)
 	*x = *opai
 	x.SystemInstruction = nil
diff --git a/model/ollama.go b/model/ollama.go
index 0a4ba25..f28c07d 100644
--- a/model/ollama.go
+++ b/model/ollama.go
@@ -102,7 +102,7 @@ func (ollm *OLLaMA) Assistant(prompt ...Content) Protocol {
 	return ollm
 }
 
-func (ollm *OLLaMA) Clone() Cloner {
+func (ollm *OLLaMA) Clone() Protocol {
 	x := new(OLLaMA)
 	*x = *ollm
 	x.Messages = nil
diff --git a/model/openai.go b/model/openai.go
index d044902..4298f38 100644
--- a/model/openai.go
+++ b/model/openai.go
@@ -156,7 +156,7 @@ func (opai *OpenAI) Assistant(prompt ...Content) Protocol {
 	return opai.normal("assistant", prompt...)
 }
 
-func (opai *OpenAI) Clone() Cloner {
+func (opai *OpenAI) Clone() Protocol {
 	x := new(OpenAI)
 	*x = *opai
 	x.Choices = nil