Google is preparing Nano Banana 3 Pro upgrade

Code references discovered by TestingCatalog suggest that Google is quietly developing a new image generation model internally dubbed GemPix 3 Pro. The references indicate the model is built on Gemini 4 Argon, which would make it part of Google's next generation of foundation models. The trail leads to what is expected to become Nano Banana 3 Pro, an upgrade to Google's existing Nano Banana line.

Nano Banana is Google's branding for on-device AI experiences, typically optimized to run efficiently on Pixel hardware without relying entirely on cloud processing. A "Pro" tier within that line suggests Google is aiming to push the quality ceiling for locally run image capabilities, potentially bringing more detailed or higher-fidelity outputs to supported devices.

GemPix, as a naming pattern, appears to be Google's internal label for Gemini-based image models - a counterpart to the text-focused Gemini variants. If GemPix 3 Pro is indeed grounded in Gemini 4 Argon, it would represent a meaningful step up from whatever architecture currently underpins image generation in the Nano Banana 2 generation, inheriting improvements in reasoning and multimodal understanding from the broader Gemini 4 family.

No release timeline or feature specifics have been confirmed by Google. Findings like these, surfaced through app teardowns and early code analysis, often precede official announcements by weeks or months - and do not always result in a public launch in the exact form described. Still, the breadcrumbs point to Google continuing to invest in on-device generative image capabilities, an area where competitors like Apple and Qualcomm are also making steady progress.