diff --git a/providers/openai/openai.go b/providers/openai/openai.go
index 5b4e2c20b50f183cf0af5d598b10108d9c4cfa00..6bfff744ebad638e145b17f7936733e17839acdb 100644
--- a/providers/openai/openai.go
+++ b/providers/openai/openai.go
@@ -207,7 +207,7 @@ func (o *provider) LanguageModel(_ context.Context, modelID string) (fantasy.Lan
 		if objectMode == fantasy.ObjectModeJSON {
 			objectMode = fantasy.ObjectModeAuto
 		}
-		return newResponsesLanguageModel(modelID, o.options.name, client, objectMode), nil
+		return newResponsesLanguageModel(modelID, o.options.name, client, objectMode, o.options.noDefaultUserAgent), nil
 	}
 
 	languageModelOptions := append([]LanguageModelOption{}, o.options.languageModelOptions...)
diff --git a/providers/openai/responses_language_model.go b/providers/openai/responses_language_model.go
index a325ed46a6c2e100aa0e895c8399ef8f863403fd..115a0ec660ec319769eff1cd7b2eeedf366039fc 100644
--- a/providers/openai/responses_language_model.go
+++ b/providers/openai/responses_language_model.go
@@ -21,20 +21,22 @@ import (
 const topLogprobsMax = 20
 
 type responsesLanguageModel struct {
-	provider   string
-	modelID    string
-	client     openai.Client
-	objectMode fantasy.ObjectMode
+	provider           string
+	modelID            string
+	client             openai.Client
+	objectMode         fantasy.ObjectMode
+	noDefaultUserAgent bool
 }
 
 // newResponsesLanguageModel implements a responses api model
 // INFO: (kujtim) currently we do not support stored parameter we default it to false.
-func newResponsesLanguageModel(modelID string, provider string, client openai.Client, objectMode fantasy.ObjectMode) responsesLanguageModel {
+func newResponsesLanguageModel(modelID string, provider string, client openai.Client, objectMode fantasy.ObjectMode, noDefaultUserAgent bool) responsesLanguageModel {
 	return responsesLanguageModel{
-		modelID:    modelID,
-		provider:   provider,
-		client:     client,
-		objectMode: objectMode,
+		modelID:            modelID,
+		provider:           provider,
+		client:             client,
+		objectMode:         objectMode,
+		noDefaultUserAgent: noDefaultUserAgent,
 	}
 }
 
@@ -668,7 +670,7 @@ func toResponsesTools(tools []fantasy.Tool, toolChoice *fantasy.ToolChoice, opti
 
 func (o responsesLanguageModel) Generate(ctx context.Context, call fantasy.Call) (*fantasy.Response, error) {
 	params, warnings := o.prepareParams(call)
-	response, err := o.client.Responses.New(ctx, *params, callUARequestOptions(call, false)...)
+	response, err := o.client.Responses.New(ctx, *params, callUARequestOptions(call, o.noDefaultUserAgent)...)
 	if err != nil {
 		return nil, toProviderErr(err)
 	}