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MODEL COMPARISON

GPT Image 1.5 vs HiDream I1: Which One Should You Use

The site has 31 and 4 reproducible cases for each, respectively. Below, we compare strengths, prompt writing, and final results side by side.

The Bottom Line

GPT Image 1.5 is better for Preserving faces and logos through edits; HiDream I1 is better for Photoreal and illustration alike. Running the same idea through both is usually worth it — they "listen" differently, so the prompt has to be adjusted to match.

Strengths & Prompt-Writing Comparison

GPT Image 1.5

Preserving faces and logos through editsRendering dense in-image textPhotographic texture and material feelFollowing long, paragraph-length instructions
It responds to a complete scene description: state the frame, camera position, lighting and materials in separate sentences instead of piling on style words. When editing, say explicitly "change only X, leave everything else as is" — that is where its preservation strength shows.

HiDream I1

Photoreal and illustration alikeFast generationOpen-source, self-hostable and tunableConcept boards and batch drafts
It reads structured descriptions well — write subject, environment, lighting and style as separate clauses. Keep style words to two or three; stack more and they fight each other.

GPT Image 1.5 Cases

A-to-Z Literacy Poster, One Animal per LetterA-to-Z Literacy Poster, One Animal per LetterGreen-Skinned Noblewoman Faces a Lion on a Misty Forest PathGreen-Skinned Noblewoman Faces a Lion on a Misty Forest PathIvory Elf Dancing Before a Golden ArchwayIvory Elf Dancing Before a Golden ArchwayLaughing Hard, Two Little Goblins Perched on Her ShouldersLaughing Hard, Two Little Goblins Perched on Her ShouldersEyes Closed Before the Mirror, Clutching a Thin BranchEyes Closed Before the Mirror, Clutching a Thin BranchSharp Eyeliner, Baring Her Teeth at the CameraSharp Eyeliner, Baring Her Teeth at the Camera

HiDream I1 Cases

These Cat-Eye Frames Get the Proportions RightThese Cat-Eye Frames Get the Proportions RightThe Volcano Painting That Spilled Into the Living RoomThe Volcano Painting That Spilled Into the Living RoomNothing But the Tiara, on WhiteNothing But the Tiara, on WhiteThe Pizza Walking Its Stroller Across the CrosswalkThe Pizza Walking Its Stroller Across the Crosswalk
All GPT Image 1.5 Cases All HiDream I1 Cases
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