diff --git a/relay/channel/deepseek/adaptor.go b/relay/channel/deepseek/adaptor.go
index 57c4c3ec..ff13efa4 100644
--- a/relay/channel/deepseek/adaptor.go
+++ b/relay/channel/deepseek/adaptor.go
@@ -68,6 +68,8 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
 		switch info.RelayMode {
 		case constant.RelayModeCompletions:
 			return fmt.Sprintf("%s/completions", fimBaseUrl), nil
+		case constant.RelayModeResponses:
+			return fmt.Sprintf("%s/responses", info.ChannelBaseUrl), nil
 		default:
 			return fmt.Sprintf("%s/v1/chat/completions", info.ChannelBaseUrl), nil
 		}
@@ -158,9 +160,33 @@ func (a *Adaptor) ConvertEmbeddingRequest(c *gin.Context, info *relaycommon.Rela
 	return nil, errors.New("not implemented")
 }
 
-func (a *Adaptor) ConvertOpenAIResponsesRequest(c *gin.Context, info *relaycommon.RelayInfo, request dto.OpenAIResponsesRequest) (any, error) {
-	// TODO implement me
-	return nil, errors.New("not implemented")
+func (a *Adaptor) ConvertOpenAIResponsesRequest(_ *gin.Context, info *relaycommon.RelayInfo, request dto.OpenAIResponsesRequest) (any, error) {
+	applyDeepSeekV4ResponsesThinkingSuffix(info, &request)
+	return request, nil
+}
+
+func applyDeepSeekV4ResponsesThinkingSuffix(info *relaycommon.RelayInfo, request *dto.OpenAIResponsesRequest) {
+	modelName := request.Model
+	if info != nil && info.ChannelMeta != nil && info.UpstreamModelName != "" {
+		modelName = info.UpstreamModelName
+	}
+	baseModel, thinkingType, effort, ok := reasoning.ParseDeepSeekV4ThinkingSuffix(modelName)
+	if ok {
+		if thinkingType == "disabled" {
+			effort = "none"
+		}
+		request.Model = baseModel
+		if request.Reasoning == nil {
+			request.Reasoning = &dto.Reasoning{}
+		}
+		request.Reasoning.Effort = effort
+		if info != nil && info.ChannelMeta != nil {
+			info.UpstreamModelName = baseModel
+		}
+	}
+	if info != nil && request.Reasoning != nil {
+		info.ReasoningEffort = request.Reasoning.Effort
+	}
 }
 
 func (a *Adaptor) DoRequest(c *gin.Context, info *relaycommon.RelayInfo, requestBody io.Reader) (any, error) {