The closest alternative to Nano Banana Pro (Gemini 3 Pro Image) is Nano Banana 2 (Gemini 3.1 Flash Image) — comparable intelligence (— vs —); for a cheaper option, GLM 5.2 runs $1.40/M vs $2.00/M; for more speed, Morph V3 Large hits 2.8k t/s; and the best open-weight substitute is GLM 5.2.
Nano Banana 2 (Gemini 3.1 Flash Image) is the closest alternative to Nano Banana Pro (Gemini 3 Pro Image), with an Intelligence Index of — (Nano Banana Pro (Gemini 3 Pro Image) scores —) at $0.500 per million input tokens.
Yes — GLM 5.2 costs $1.40 per million input tokens versus $2.00 for Nano Banana Pro (Gemini 3 Pro Image), while staying within ~8 points of its Intelligence Index.
GLM 5.2 is the strongest open-weight alternative to Nano Banana Pro (Gemini 3 Pro Image) — downloadable from Hugging Face and self-hostable, scoring 50.7 on intelligence.