GPT Image 2 is the newer model, released after Stable Diffusion 3.5 Medium.
| Spec | GPT Image 2 | Stable Diffusion 3.5 Medium |
|---|---|---|
| Parameters | Not disclosed | Not disclosed |
| Weights | — | Open |
| Released | Apr 2026 | Oct 2024 |
Not enough votes to call it. On the specs, GPT Image 2 has the edge: newer, major provider backing.