diff --git a/openai/openai.go b/openai/openai.go
index 2bf9b9f9..cc193863 100644
--- a/openai/openai.go
+++ b/openai/openai.go
@@ -81,6 +81,7 @@ type ChatCompletionRequest struct {
 	FrequencyPenalty *float64        `json:"frequency_penalty"`
 	PresencePenalty  *float64        `json:"presence_penalty"`
 	TopP             *float64        `json:"top_p"`
+	NumCtx           *int            `json:"num_ctx"`
 	ResponseFormat   *ResponseFormat `json:"response_format"`
 	Tools            []api.Tool      `json:"tools"`
 }
@@ -475,6 +476,10 @@ func fromChatRequest(r ChatCompletionRequest) (*api.ChatRequest, error) {
 		options["top_p"] = 1.0
 	}
 
+	if r.NumCtx != nil {
+		options["num_ctx"] = *r.NumCtx
+	}
+
 	var format string
 	if r.ResponseFormat != nil && r.ResponseFormat.Type == "json_object" {
 		format = "json"