Navigate to the Firefly website homepage and select Custom models from the top menu bar.
Last updated on
Jun 9, 2025
Learn how to retrain your Adobe Firefly Custom Models to use new versions of the Adobe Firefly Image Model.
Adobe releases new versions of its Firefly Image Model to improve image generation quality and accuracy. Training and retraining Custom Models on the latest version lets you leverage these improvements. All new custom models will be trained on Image Model 4 as of June 9, 2025. You can continue to generate images with your existing Image 3 custom models through June 10, 2026. You can retrain them using Image Model 4 by following the steps in this guide.
You can retrain a model from the model inventory page. For example, you can follow the following steps when you are retraining a Custom Model in Adobe Firefly.
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On the Your models page, select a custom model in Ready, Published, or Unpublished status.
All trained custom models have a badge showing the Firefly Image Model used for the training. To quickly identify the image model, switch to the list view, select Firefly Model, and sort the list in descending or ascending order.
Switch to the list view and sort the list in descending or ascending order to quickly identify the image model used for training. Switch to the list view and sort the list in descending or ascending order to quickly identify the image model used for training. -
Select icon for a model and select Duplicate.
Use the Duplicate option to begin creating a copy of the model for retraining. Use the Duplicate option to begin creating a copy of the model for retraining. -
In the retrain notification, choose one of the following options:
Duplicate and update captions
Duplicate and keep captions
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Selecting Duplicate and update captions will duplicate your training data and overwrite the existing image captions with new ones.
Custom models perform best with simplified captions with fewer than 15-18 words. When you select Duplicate and update captions, Firefly will update your captions, overwriting the existing ones. However, you can still review and edit the new captions before the model is retrained.
You have the option to duplicate the existing model with or without recaptioning. You have the option to duplicate the existing model with or without recaptioning. -
Select Duplicate to start the duplication and recaptioning process.
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Once the model is duplicated, it will be available on the Your models page in Draft status.
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Open the new draft model, review the captions, add or remove images, and adjust the model name.
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Select Train to start the training. While the training is in progress, you can leave this page or return to the model inventory page.
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Once the training is complete, it will reflect on the Your models page with a Ready status.
View trained custom models inventory
A. Firefly Image Model used B. Training mode selected C. Custom model status
Preview and test custom models
After you train a custom model, you can test if it matches your intention before publishing it for use by content generators. If you'd like to make modifications, you can duplicate your training data and add or remove images or change the captions before training.
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On the Firefly website homepage, select Custom models.
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Select icon for a model and select Preview and Test.
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Your model will open in the Preview and Test mode with the sample prompt entered into the prompt field.
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Under the General settings section, ensure that the right model is selected from the Model dropdown menu.
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Adjust the Aspect ratio, Content type, Composition and Style references, and Effects if necessary.
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Enter a detailed prompt and select Generate.
Note:When testing a subject model, make sure to add the keyword in the Concept field as the main subject of your prompt.
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Reword your prompt or try other prompts to test your custom model.
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Once you are done testing the model and are satisfied with the results, you can publish the custom model so that it's available for entitled users to use and generate image variations. If you aren't happy with the results, you can duplicate and make additional tweaks to the images or captions.
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Remember to unpublish the version of the model that was trained on the older version of the Firefly Image Model.
Note:
All users within your organization entitled to generate assets using custom models can access and use the published models using the Text to image feature on the Firefly website.
Join our community to connect, learn, and engage
For inspiration, expert tips, and solutions to common issues, visit Discord or the Adobe Firefly Community forum. Connect with our team and fellow users to exchange ideas, share your creations, stay updated with the latest features and announcements, and provide feedback.
