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feat: support gpt-image-2 widescreen ratios #3

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Merged
yujiaxu-ops merged 1 commit into from
Aug 25, 2026
Merged

feat: support gpt-image-2 widescreen ratios #3

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9 changes: 5 additions & 4 deletions src/internal/image-models.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -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"]);

/**
Expand All @@ -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`,
);
}
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6 changes: 3 additions & 3 deletions tests/image-models.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -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/,
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