GPT Image 2.5 SunburstvsImagen 4 Fast
GPT Image 2.5 Sunburst is the newer model, released after Imagen 4 Fast.
| Spec | GPT Image 2.5 Sunburst | Imagen 4 Fast |
|---|---|---|
| Input price | $5/M tokens | — |
| Output price | $30/M tokens | — |
| Parameters | Not disclosed | Not disclosed |
| Weights | Closed | — |
| Free API (OpenRouter) | No | — |
| Released | Sep 2026 | Jun 2025 |
Our Verdict
GPT Image 2.5 Sunburst
Imagen 4 Fast
Not enough votes to call it. On the specs, nothing separates them.
Too close to call
API pricing
Cost per 1M tokens
GPT Image 2.5 Sunburst
Input
$5.00
Output
$30.00
Imagen 4 Fast
Input
—
Output
—
Where to run it
1 host
GPT Image 2.5 Sunburst1 host
Imagen 4 Fast
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 11 Sep 2026.
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