--- title: "Generate images with Ideogram 4.5, from a prompt or by transforming source images" method: POST path: "/v2/image/generate/ideogram-4-5" tags: ["images-generate"] --- # Generate images with Ideogram 4.5, from a prompt or by transforming source images `POST /v2/image/generate/ideogram-4-5` Generate one or more images with Ideogram 4.5. Supplying source images turns the request into an image-to-image transform: the model conditions on the sources, the prompt becomes optional guidance, and `size` may be "auto" to derive the output from the first source. Provide sources either as `image_asset_identifiers` references or as raw `images` bytes (multipart requests only); if both are supplied, the references win and the bytes are ignored. The `prompt` accepts either natural language or a structured Ideogram 4.0 JSON prompt; the server detects which was supplied. `magic_prompt` controls automatic prompt rewriting: `auto` (the default) and `on` rewrite a natural-language prompt, a prompt that is already a valid structured JSON prompt is always consumed directly, and `off` disables rewriting entirely so the model receives your prompt verbatim. Ideogram 4.5 renders a fixed set of output sizes. When `size` is omitted, the server picks a supported size automatically based on the prompt. By default the request blocks until the images are ready and returns them in `data`. Set `async` to true to return immediately after the request is accepted, then poll for completion and results with `GET /v1/generations/{generation_id}` using the returned `generation_id`. Supplying a `webhook_url` makes the request asynchronous whatever `async` says: the response returns as soon as the request is accepted, and the finished result is POSTed to that URL. ## Query parameters - `dry_run` boolean ## Request body - GenerateImageIdeogram45Request — Source images are optional. When supplied, the request becomes an image-to-image transform: the prompt becomes optional guidance and `size` defaults to "auto" (derived from the first source). Without source images a prompt is required. - `prompt` string — The prompt to generate images from. Accepts either natural language or a structured Ideogram 4.0 JSON prompt; the server detects which was supplied. Required without source images; with sources it is optional guidance and may be empty. - `magic_prompt` 'auto' | 'on' | 'off' — Determine if MagicPrompt should be used in generating the request or not. - `image_asset_identifiers` AssetIdentifier[] — Existing upload or generated image assets to transform, by reference. Takes priority over `images` if both are supplied. The first source is the primary image; any further sources are additional references. Supplying sources turns the request into an image-to-image transform. - `asset_type` 'ASSET' | 'CANVAS_ASSET' | 'LAYERED_ASSET' | 'RESPONSE' | 'UPLOAD', required - `asset_id` string, required - `images` string[] — The source images to transform (max 5, max size 25MB per image), as raw bytes; only JPEG, PNG, and WEBP formats are supported. Multipart requests only; ignored if `image_asset_identifiers` is also supplied. - `size` string, nullable — The output size: "auto" or an exact "WIDTHxHEIGHT". Without source images, an exact size must be one of the supported 1K/2K presets (for example 1024x1024, 2048x2048 or 1440x2880); "auto" or omitted lets the server pick a supported size based on the prompt. With source images, "auto" (the default) uses the supported resolution closest to the first source's dimensions, and an exact size must have both dimensions multiples of 32 and at least 256px, the total size at most 2048x2048 pixels, and the aspect ratio at most 6:1. Pricing is tiered by the resolved output pixels: up to 1024x1024 bills as 1K, above that as 2K. - `rendering_speed` 'turbo' | 'default' | 'quality' — The rendering speed to use. - `seed` integer — Random seed. Set for reproducible generation. - `num_images` integer — The number of images to generate. - `enable_copyright_detection` boolean, nullable — Optional. Opt this request into post-generation copyright detection. Adds detection latency; flagged images come back with `is_image_safe: false`. - `async` boolean — When false (the default), the request blocks until the images are ready and returns them in `data`. When true, the request returns as soon as it is accepted; poll for completion and results with `GET /v1/generations/{generation_id}` using the returned `generation_id`. - `webhook_url` string, uri — HTTPS URL that Ideogram delivers the generated result to. Ideogram sends a JSON POST to this URL once all images for the request have finished generating. The body mirrors the synchronous generate response: `request_id`, `created`, and a `data` array containing every generated image (`url`, `prompt`, `resolution`, `seed`, `is_image_safe`). Each delivery is signed with Ed25519 and verifiable against the public keys at `https://api.ideogram.ai/v1/.well-known/jwks.json`. Must be HTTPS; private and loopback hosts and the cloud metadata service are rejected. - `private` boolean, nullable — When true or omitted, the output is kept private to your account. Set to false to publish the output to the public feed. Enterprise accounts always generate privately. - `target_collection_id` string — A collection you can write to, by its URL-safe base64 collection id. The output images are added to it when the request completes. ## Response `200` The generated images (synchronous requests), or an acknowledgement to poll with `GET /v1/generations/{generation_id}` (`async` requests). - GenerateImageIdeogram45Response — Response returned by `POST /v2/image/generate/ideogram-4-5`. Synchronous requests (the default) include the generated images in `data`. Requests with `async` set to true omit `data`; poll for completion and results with `GET /v1/generations/{generation_id}` using the returned `generation_id`. The seed reports the value the request resolved to when the caller left it unset. - `generation_id` string, required — URL-safe base64 ID of the accepted generation. Accepted by the `GET /v1/generations/{generation_id}` polling endpoint. - `data` GeneratedImageObject[] — The generated images, in generation order. Present only for synchronous requests (`async` omitted or false). - `url` string, uri, nullable — The direct link to the generated image. Empty when the image did not pass safety checks. - `prompt` string, required — The final prompt the image was generated from. - `resolution` string, required — The resolution of the generated image, formatted as "WIDTHxHEIGHT". - `is_image_safe` boolean, required — Whether the image passed safety checks. If false, `url` is empty. - `seed` integer, required — Random seed. Set for reproducible generation. - `seed` integer, required — Random seed. Set for reproducible generation. ## Other responses - `400` — Invalid input provided. - `401` — Unauthorized. - `402` — Insufficient credits or quota. - `422` — The prompt did not pass safety checks. - `429` — Too many requests. - `500` — Internal server error. - `503` — The endpoint is temporarily unavailable. ## Changes - **2026-09-19** `4e95197be44a` — 1 info - endpoint added [Change history](https://skmtc.dev/ideogram/apis/ideogram-openapi-3-0/changes/v2/image/generate/ideogram-4-5/post.md) --- [API](https://skmtc.dev/ideogram/apis/ideogram-openapi-3-0.md) · [All operations](https://skmtc.dev/ideogram/apis/ideogram-openapi-3-0/llms.txt) · [OpenAPI document](https://skmtc.dev/ideogram/apis/ideogram-openapi-3-0/revisions/4e95197be44a?raw)