Gemini 2.5 Flash Image, a.k.a. "Nano Banana," is now generally available. It is a state of the art image generation model with contextual understanding. It is capable of image generation, edits, and multi-turn conversations. Aspect ratios can be controlled with the image_config API Parameter
Effective Pricing for Gemini 2.5 Flash Image (Nano Banana)
Actual cost per million tokens across providers over the past hour