Google is preparing to launch Nano Banana 2 Flash, a cost-optimized image generation model powered by Gemini 3 Flash rather than the pricier Gemini 3 Pro. Code references discovered in Gemini's web interface reveal the internal codename "Mayo," following the "Ketchup" designation used for Nano Banana 2 Pro. Gemini 3 Flash appeared on LM Arena on December 7, signaling an imminent public release.
Early access samples show Nano Banana 2 Flash producing outputs that closely match Nano Banana 2 Pro quality, including 4K resolution support. The Flash model targets developers and organizations running high-volume image generation where Pro-tier pricing becomes prohibitive. Current Nano Banana Pro costs $0.134 per 2K image and $0.24 per 4K image through the Gemini API.
Google has not announced official pricing or a launch date. Based on the company's tiering strategy and code rollout patterns, a public release is expected within the coming weeks of December 2025.
The Bottom Line: Nano Banana 2 Flash brings Gemini 3-level image generation to cost-sensitive applications, potentially cutting API expenses while maintaining Pro-equivalent output quality.
QUICK FACTS
- Codename: Mayo (Pro version was Ketchup)
- Architecture: Gemini 3 Flash (not Gemini 3 Pro)
- Resolution: Up to 4K in early samples
- LM Arena appearance: December 7, 2025
- Expected release: Late December 2025
