diff --git a/src/internal/image-models.ts b/src/internal/image-models.ts
index 509cf29..fd691f4 100644
--- a/src/internal/image-models.ts
+++ b/src/internal/image-models.ts
@@ -16,16 +16,17 @@ export const IMAGE_MODELS = [
 export const DEFAULT_IMAGE_MODEL = "gpt-image-2";
 
 export const IMAGE_MODEL_HELP =
-  "gpt-image-2 (default, best; ratios 1:1|3:2|2:3) | nano-banana-pro | nano-banana-2 | " +
+  "gpt-image-2 (default, best; ratios 1:1|16:9|9:16|3:2|2:3) | nano-banana-pro | nano-banana-2 | " +
   "nano-banana-2-lite (fastest, cheapest) | nano-banana (legacy)";
 
 export const ASPECT_RATIOS = ["1:1", "16:9", "9:16", "4:3", "3:4", "3:2", "2:3"] as const;
 
 export const ASPECT_RATIO_HELP =
-  "default: 1:1. nano-banana*: 1:1|16:9|9:16|4:3|3:4. gpt-image-2: 1:1|3:2|2:3. " +
+  "default: 1:1. nano-banana*: 1:1|16:9|9:16|4:3|3:4. " +
+  "gpt-image-2: 1:1|16:9|9:16|3:2|2:3. " +
   "Mutually exclusive with --generate-multi-view";
 
-const GPT_IMAGE_2_RATIOS = new Set(["1:1", "3:2", "2:3"]);
+const GPT_IMAGE_2_RATIOS = new Set(["1:1", "16:9", "9:16", "3:2", "2:3"]);
 const NANO_BANANA_RATIOS = new Set(["1:1", "16:9", "9:16", "4:3", "3:4"]);
 
 /**
@@ -47,7 +48,7 @@ export function checkImageCombo(opts: {
   if (!supported.has(ratio)) {
     throw new UsageError(
       opts.aiModel === "gpt-image-2"
-        ? `--aspect-ratio ${ratio} is not supported by gpt-image-2 (use 1:1, 3:2, or 2:3)`
+        ? `--aspect-ratio ${ratio} is not supported by gpt-image-2 (use 1:1, 16:9, 9:16, 3:2, or 2:3)`
         : `--aspect-ratio ${ratio} is only supported by gpt-image-2`,
     );
   }
diff --git a/tests/image-models.test.ts b/tests/image-models.test.ts
index 065e920..f780fdc 100644
--- a/tests/image-models.test.ts
+++ b/tests/image-models.test.ts
@@ -21,11 +21,11 @@ test("checkImageCombo — multi-view excludes aspect-ratio", () => {
   checkImageCombo({ aiModel: "nano-banana", generateMultiView: true });
 });
 
-test("checkImageCombo — gpt-image-2 accepts only 1:1, 3:2, 2:3", () => {
-  for (const ratio of ["1:1", "3:2", "2:3"]) {
+test("checkImageCombo — gpt-image-2 accepts square, widescreen, and native ratios", () => {
+  for (const ratio of ["1:1", "16:9", "9:16", "3:2", "2:3"]) {
     checkImageCombo({ aiModel: "gpt-image-2", aspectRatio: ratio });
   }
-  for (const ratio of ["16:9", "9:16", "4:3", "3:4"]) {
+  for (const ratio of ["4:3", "3:4"]) {
     assert.throws(
       () => checkImageCombo({ aiModel: "gpt-image-2", aspectRatio: ratio }),
       /not supported by gpt-image-2/,