diff --git a/lib/ai/providers/openai-image.ts b/lib/ai/providers/openai-image.ts
index 7c13ffc05..ca0a350b5 100644
--- a/lib/ai/providers/openai-image.ts
+++ b/lib/ai/providers/openai-image.ts
@@ -28,6 +28,7 @@ const DEFAULT_TIMEOUT_MS = 300000;
 const OPENAI_IMAGE_MIN_TOTAL_PIXELS = 3_686_400;
 const OPENAI_IMAGE_DIMENSION_MULTIPLE = 16;
 const BLTCY_HOST_REGEX = /(^|\.)bltcy\.ai$/i;
+const COMFLY_HOST_REGEX = /(^|\.)ai\.comfly\.org$/i;
 const SUPPORTED_ASPECT_RATIOS = [
   "1:1",
   "1:4",
@@ -70,6 +71,15 @@ function shouldUseBltcyImageCompatParams(baseURL: string) {
   return isBltcyBaseURL(baseURL);
 }
 
+function isComflyBaseURL(baseURL: string) {
+  try {
+    const parsed = new URL(normalizeBaseURL(baseURL));
+    return COMFLY_HOST_REGEX.test(parsed.hostname);
+  } catch {
+    return false;
+  }
+}
+
 function normalizeImageSizeLabel(imageSize?: string): "1K" | "2K" | "4K" {
   const normalized = String(imageSize || "").trim().toUpperCase();
   if (normalized === "1K" || normalized === "2K" || normalized === "4K") return normalized;
@@ -180,6 +190,32 @@ function resolveOpenAISize(aspectRatio: string, imageSize: "1K" | "2K" | "4K") {
   return `${width}x${height}`;
 }
 
+function resolveLongestEdgeSize(aspectRatio: string, imageSize: "1K" | "2K" | "4K") {
+  const edgeMap: Record<typeof imageSize, number> = {
+    "1K": 1024,
+    "2K": 2048,
+    "4K": 4096,
+  };
+  const ratioPair = parseAspectRatioPair(aspectRatio) || { width: 1, height: 1 };
+  const longestEdge = edgeMap[imageSize] || edgeMap["2K"];
+  const scale = longestEdge / Math.max(ratioPair.width, ratioPair.height);
+  const width = ceilToMultiple(ratioPair.width * scale, OPENAI_IMAGE_DIMENSION_MULTIPLE);
+  const height = ceilToMultiple(ratioPair.height * scale, OPENAI_IMAGE_DIMENSION_MULTIPLE);
+
+  return `${width}x${height}`;
+}
+
+function resolveProviderImageSize(
+  baseURL: string,
+  aspectRatio: string,
+  imageSize: "1K" | "2K" | "4K"
+) {
+  if (isComflyBaseURL(baseURL)) {
+    return resolveLongestEdgeSize(aspectRatio, imageSize);
+  }
+  return resolveOpenAISize(aspectRatio, imageSize);
+}
+
 function normalizeQuality(value?: string) {
   const normalized = String(value || "").trim().toLowerCase();
   if (normalized === "low" || normalized === "medium" || normalized === "high") {
@@ -540,7 +576,7 @@ export function createOpenAIImage({ apiKey, baseURL }: OpenAIImageConfig) {
         const imageSize = normalizeImageSizeLabel(options.imageParams?.imageSize);
         const size =
           options.imageParams?.size ||
-          (aspectRatio ? resolveOpenAISize(aspectRatio, imageSize) : undefined);
+          (aspectRatio ? resolveProviderImageSize(baseURL, aspectRatio, imageSize) : undefined);
         const quality = normalizeQuality(options.imageParams?.quality);
         const background = normalizeBackground(options.imageParams?.background);
         const outputFormat = normalizeOutputFormat(options.imageParams?.outputFormat);
@@ -551,6 +587,7 @@ export function createOpenAIImage({ apiKey, baseURL }: OpenAIImageConfig) {
           aspectRatio: aspectRatio || "auto",
           promptAspectRatio: promptAspectRatio || undefined,
           imageSize,
+          resolutionMode: isComflyBaseURL(baseURL) ? "longest-edge" : "pixel-area",
           useBltcyImageCompatParams: shouldUseBltcyImageCompatParams(baseURL),
           imageCount: imageUrls.length,
           baseURL: normalizeBaseURL(baseURL),