HiDream O1 Image Dev Edit API

HiDream-O1-Image Dev (Edit)

HiDream-O1-Image Dev is the distilled variant of HiDream-O1-Image. The same single native model handles text-to-image, prompt-driven editing, and subject-driven personalization at up to 2K (≈2048×2048) — but tuned for fast, low-step inference so you pay less and wait less per edit. Provide one or more reference images plus an instruction; the model edits while keeping identity, composition, and lighting stable.

Why Choose This?

• Distilled for speed — Fewer denoising steps than the full HiDream-O1-Image, lower latency per edit.
• Lower cost — Half the price of the full model, ideal for batch editing, e-commerce variations, and rapid iteration.
• Identity-preserving edits — Keeps the subject, pose, and overall composition stable while applying the requested change.
• Multi-reference support — Accepts one image for plain editing, or multiple reference images for subject-driven personalization (consistent characters, products, IPs).
• High-resolution output — Up to ~2048×2048 with sharp detail and natural lighting.
• Strong instruction following — Faithfully interprets edit instructions (wardrobe, scene tweaks, object swaps, style changes, on-image text).
• Multiple output formats — JPEG, PNG, or WEBP.
• Reproducibility — Use a fixed seed to recreate exact results.

Parameters

Parameter	Required	Description
prompt	Yes	Text instruction describing the edit you want to make.
images	Yes	Reference images for editing or subject-driven personalization. Each entry is a public URL or base64 data URI (PNG, JPEG, JPG, or WebP, up to 50MB, aspect ratio between 1:4 and 4:1). Pass one image for editing, multiple for subject-driven personalization.
size	No	Output image size as WIDTH*HEIGHT (default: 2048*2048). The model snaps to the closest supported resolution.
output_format	No	Output format: jpeg, png, or webp (default: jpeg).
seed	No	Random seed for reproducible generation.
enable_sync_mode	No	API only — wait for the result and return it inline.
enable_base64_output	No	API only — return the image as a base64 string instead of a URL.

How to Use

1. Upload your reference image(s) — drag and drop or paste publicly accessible URLs. One image for editing, multiple for subject-driven personalization.
2. Write your edit instruction — describe both the change and what to keep (e.g., "Change the jacket to black leather. Keep the person, pose, and background unchanged.").
3. Choose size (optional) — keep the source aspect ratio or pick a new one.
4. Set output_format — JPEG for compact files, PNG for lossless, WEBP for balance.
5. Set seed (optional) — pin a number to reproduce the same edit.
6. Run — submit the request and download the edited image.

Pricing

Flat rate per edit — half the price of the full HiDream-O1-Image (Edit).

Output	Cost
Per image edit	$0.02

Best Use Cases

• Batch e-commerce variations — Multiple colorways or styling options from a hero shot, at scale.
• Subject-driven personalization — Pass several reference images to keep a character / product / IP consistent across new scenes.
• Wardrobe & accessory edits — Swap clothing color/style, add/remove glasses, hats, jewelry.
• Background & scene tweaks — Replace backgrounds or swap props while keeping the subject pixel-stable.
• Object add / remove / replace — Cleanly modify specific elements without disturbing the rest of the scene.
• Style transfer — Apply a new look while preserving the subject's identity.
• Marketing iteration — Quickly produce many creative variants per source image at low cost.

Dev vs. Full — Which to Pick?

	HiDream-O1-Image Dev (Edit)	HiDream-O1-Image (Edit, Full)
Speed	Faster (distilled, fewer steps)	Standard
Cost / edit	$0.02	$0.04
Quality ceiling	High	Highest
Best for	Batches, drafts, low-cost edits	Final hero edits

Prompting Guide

For clean results, specify both the change and what to preserve:

Template:

Keep the same person, pose, and background. Change [target edit]. Keep lighting natural and consistent.

Examples:

• "Keep the same person and pose. Change the outfit to a light gray sweater and add gold thin-rimmed glasses. Keep the background and lighting unchanged."
• "Keep identity and composition. Replace the jacket with a black leather jacket; keep realistic fabric texture and natural shadows."
• "Keep the subject unchanged. Remove the object on the table and keep the scene lighting consistent."
• "Keep the person and pose. Change the background to a sunlit beach at golden hour."

For subject-driven personalization, pass several reference images of the same subject (different angles / outfits / lighting) and describe the new scene; the model uses them jointly to keep identity consistent.

Pro Tips

• Always state what should stay the same — it dramatically improves identity preservation.
• For multi-reference personalization, give 3–5 varied shots of the subject for best identity locking.
• Reference elements explicitly: "the text on the shirt", "the background", "the person on the left".
• Pin a seed while iterating so you can compare prompt variants against a fixed baseline.
• For multi-step edits, prefer sequential single-purpose prompts over one long compound instruction.
• Use png for lossless edits when output will be re-edited downstream.

Notes

• If using URLs for the source images, ensure they are publicly accessible.
• The enable_base64_output and enable_sync_mode options are only available through the API.
• Higher resolutions may slightly increase processing time.
• Ensure prompts comply with content guidelines.

Related Models

• HiDream-O1-Image Dev · Text-to-Image — Same distilled model, in text-to-image mode.
• HiDream-O1-Image · Edit — The full (non-distilled) edit model for highest fidelity.
• HiDream-O1-Image · Text-to-Image — Full model in text-to-image mode.