Higgsfield Soul ID vs .char: which to use for consistent characters
Use Higgsfield Soul ID if you want a polished hosted platform with a model marketplace and Cinema Studio, and you have 20 or more photos. Use .char if you want to own your character as a portable, open-source file that starts from 1 to 2 photos and keeps body, wardrobe and voice consistent.
TL;DR
| ROW | Soul ID | .char |
|---|---|---|
| Training needed | Yes, per model | None on FLUX.2 and H3 R2V. An adapter trained once on Krea 2 and other H3 nodes |
| Photos required | 20 or more | 1 to 2 |
| Models supported | Models on Higgsfield, trained per model | FLUX.2, Krea 2, FLUX.1, Z-Image Turbo, MiniMax H3, LTX-2.5, plus Nano Banana Pro and H3 R2V via fal |
| Portable file | No, platform-locked | Yes, one .char file |
| Face / body / wardrobe / voice | Face only | Face, body, wardrobe and an optional voice clip |
| Runs locally | No, platform-locked | Yes, in the OmniChar app and ComfyUI, or hosted on OmniChar Cloud |
| Open source | No, platform only | Yes, GPL-3.0 |
| Cost | Higgsfield credits | Free to run locally. OmniChar Cloud uses credits |
| Drift measurement | None | Continuity score out of 100 on every take |
What each one is
Soul ID
Soul ID is the character feature on Higgsfield. You upload 20 or more photos, and it trains for each model you use. It focuses on faces and runs on the Higgsfield platform, paid with credits. Higgsfield also offers a model marketplace and Cinema Studio in the same product.
.char
A .char is one portable file that holds reference photos, an identity fingerprint, a locked description, an optional trained adapter and an optional voice clip. It works in the OmniChar app, the ComfyUI node and OmniChar Cloud. FLUX.2 and H3 R2V use the references directly; Krea 2 and other H3 nodes use an adapter trained once. Every take gets a continuity score out of 100.
Strengths
Where Soul ID wins
- A large model marketplace in one place
- Cinema Studio, built into the same platform
- A polished hosted product with nothing to install
Where .char wins
- Works from 1 to 2 photos instead of 20 or more
- A .char is a portable, open-source file (GPL-3.0) that stays with you
- Run it locally, or hosted on OmniChar Cloud
- Carries body, wardrobe and voice, not only the face
When to use which
Questions
How many photos does each need?
Soul ID asks for 20 or more photos. A .char works from 1 to 2.
Can I take a Soul ID character elsewhere?
Soul ID is tied to the Higgsfield platform. A .char is a file you can use in the OmniChar app, ComfyUI or OmniChar Cloud.
Does Soul ID handle clothing or voice?
Soul ID covers faces. A .char also holds body, wardrobe and an optional voice clip.
Do I need to retrain for each model?
Soul ID trains per model. A .char uses references directly on FLUX.2 and H3 R2V, and an adapter trained once on Krea 2 and other H3 nodes.
What does each cost?
Soul ID uses Higgsfield credits. OmniChar is free to run locally, and OmniChar Cloud uses credits.