From 77eb536b69045a1d13d2220ea4393d5d1259ad0c Mon Sep 17 00:00:00 2001
From: feitianbubu <feitianbubu@qq.com>
Date: Sat, 29 Nov 2025 00:44:12 +0800
Subject: [PATCH] fix: nano-banana not compatible imageSize

---
 relay/channel/gemini/adaptor.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/relay/channel/gemini/adaptor.go b/relay/channel/gemini/adaptor.go
index fcc99b66..b28c2524 100644
--- a/relay/channel/gemini/adaptor.go
+++ b/relay/channel/gemini/adaptor.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"slices"
 	"strings"
 
 	"github.com/QuantumNous/new-api/dto"
@@ -170,6 +171,12 @@ func (a *Adaptor) ConvertImageRequest(c *gin.Context, info *relaycommon.RelayInf
 		}
 
 		config := processSizeParameters(strings.TrimSpace(request.Size), request.Quality)
+
+		// 兼容 nano-banana 传quality[imageSize]会报错 An internal error has occurred. Please retry or report in https://developers.generativeai.google/guide/troubleshooting
+		if slices.Contains([]string{"nano-banana", "gemini-2.5-flash-image"}, info.UpstreamModelName) {
+			config.ImageSize = ""
+		}
+
 		googleGenerationConfig := map[string]interface{}{
 			"responseModalities": []string{"TEXT", "IMAGE"},
 			"imageConfig":        config,