When was Chroma1-HD released?

Chroma1-HD was released around 1 Aug 2025.

Is Chroma open source?

Yes. Chroma1-HD ships open weights under the Apache 2.0 licence.

Can Chroma be used commercially?

Yes. Commercial use of Chroma1-HD is allowed under the Apache 2.0 licence.

Where can I use Chroma?

Chroma1-HD is available via Self-host and Community API.

Open weightsFree

Chroma

Lodestone Rock

Chroma is an image generation model line from Lodestone Rock. The latest release is Chroma1-HD (1 Aug 2025). Specs, licensing, and availability below. Official site →

Chroma1-HDreleased ~ 1 Aug 2025

Open weightsFreeCommunity APISelf-host

Pruned and retrained from FLUX.1-schnell; uncensored community base

License: Apache 2.0
Commercial use: Allowed
Availability: Self-host, Community API
Parameters: 8.9B

Date approximate - month-level; long rolling-checkpoint training.

Official announcement →

FAQ

When was Chroma1-HD released?: Chroma1-HD was released around 1 Aug 2025.
Is Chroma open source?: Yes. Chroma1-HD ships open weights under the Apache 2.0 licence.
Can Chroma be used commercially?: Yes. Commercial use of Chroma1-HD is allowed under the Apache 2.0 licence.
Where can I use Chroma?: Chroma1-HD is available via Self-host and Community API.

See Chroma in context on the image model timeline, or browse all model families.