Models
Each model has one set of settings. Your assistant uses the default unless you name another. Every image and video model can also work from a reference image.
Images
GPT Image 2.5 Flaredefault
gpt-image-2.5-flare
gpt-image-2.5-sunburst
nano-banana-2
grok-imagine-image-2.0
Video
Voice
Music
Lyria 3 Prodefault
lyria-3-pro
lyria-3.5