HiDream-I1 and the HiDream models
HiDream.ai released HiDream-I1 in April 2025 as one of the largest image models with genuinely permissive weights, under MIT. The Full variant has the page here and ran the same twelve prompts as every other image model; Dev and Fast trade steps for speed and E1 is the editing model.
HiDream.ai · facts checked
Which one to pick
Side by side, measured
| Model | Price | Seconds per image | Cost of its fixed set | Sizes |
|---|---|---|---|---|
| HiDream-I1 Full | $0.05 per megapixel via fal | 13 to 104 | $0.95 12 prompts | fal's presets or custom pixels; our requested sizes came back slightly different |
Seconds and cost are from our own runs of each model's fixed set: the same 12 prompts for every model that makes pictures from a prompt. Open a model for every picture and the request behind it.
Every version
| Version | Released | What changed |
|---|---|---|
| HiDream-I1 Full hidream-i1-full | 17-billion-parameter open-weight model under MIT, 50 steps. | |
| HiDream-I1 Dev and Fast | 28 and 16 step variants of the same weights. | |
| HiDream-E1 | Instruction-based editing model; E1.1 followed on 16 July 2025. |
Frequently asked questions
What licence is HiDream-I1 under?
MIT, for all three I1 variants.