Reproduction steps:
1. Create a new project
2. Install AI packages by clicking AI button in the top Editor toolbar and then clicking “Agree and install Unity AI” button
3. AI > Generate > Texture
4. Press “Change” button to open “Select AI Model” window
5. Select “Cyberpunk” AI Model and observe that it has "Characters" Tag
6. Enter any character in Prompt field (e.g. “Cat”)
7. Press “Generate” button and observe the generated result

Actual result: Machine is displayed in the generated image instead of the entered character
Expected result: Entered character is displayed in generated image

Reproducible with: 1.6.0-pre.1 (6000.4.0b12), 2.0.0-pre.1 (6000.4.0b12)
Couldn’t reproduce with: 6000.0.70f1 (No Assistant package), 1.5.0-pre.2 (6000.4.0b12) (Outdated package version warning prevents from opening package related windows)

Reproduced on: Ubuntu 24.04, macOS Sequoia 26.2 (M4)

Note: Issue is also reproducible when generating Sprites with “Cyberpunk” AI Model