Imagen 3 vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Nano Banana 2 ($3/M output) appears to be Google's multimodal workhorse optimized for cost-efficiency, while Imagen 3 ($40,000/M output) is positioned as a premium specialized image generator. The massive price difference reflects Imagen 3's focus on highest-quality single image generation versus Nano Banana 2's versatile text+image->text+image pipeline that handles 66K token contexts.

Nano Banana 2's 62/100 score benefits from its multimodal capabilities including vision understanding, reasoning, and JSON mode output - features completely absent in Imagen 3 (16/100). The benchmark appears to reward versatility, where Nano Banana 2's ability to process existing images alongside text prompts provides more practical value than Imagen 3's pure text-to-image generation.

Imagen 3 would cost $4,000/month (100K images at $40,000/M), while Nano Banana 2 costs just $0.30/month at $3/M output. However, if image quality is paramount and you're generating marketing assets or artistic content where each image matters, Imagen 3's 13,333x premium might be justified - though its #10 ranking suggests even quality-focused users might find better alternatives.

Migration makes sense for most use cases: you'll save 99.99% on costs while gaining streaming, JSON mode, and the ability to analyze existing images (vision capability). The only reason to stay with Imagen 3 is if your pipeline specifically requires its exact image generation characteristics, though with a 16/100 score, you might consider other specialized models instead.