The closest alternative to Nano Banana 2 (Gemini 3.1 Flash Image) is Nano Banana Pro (Gemini 3 Pro Image) — comparable intelligence (— vs —); for a cheaper option, MiniMax M3 runs $0.300/M vs $0.500/M; for more speed, Morph V3 Large hits 2.8k t/s; and the best open-weight substitute is GLM 5.2.
Nano Banana Pro (Gemini 3 Pro Image) is the closest alternative to Nano Banana 2 (Gemini 3.1 Flash Image), with an Intelligence Index of — (Nano Banana 2 (Gemini 3.1 Flash Image) scores —) at $2.00 per million input tokens.
Yes — MiniMax M3 costs $0.300 per million input tokens versus $0.500 for Nano Banana 2 (Gemini 3.1 Flash Image), while staying within ~8 points of its Intelligence Index.
GLM 5.2 is the strongest open-weight alternative to Nano Banana 2 (Gemini 3.1 Flash Image) — downloadable from Hugging Face and self-hostable, scoring 50.7 on intelligence.