Nano Banana Pro (Gemini 3 Pro Image) vs GLM 5.1: side-by-side summary

Nano Banana Pro (Gemini 3 Pro Image) and GLM 5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Nano Banana Pro (Gemini 3 Pro Image), from Google, has a 131,072-token context window and is priced at $2/M tokens input, $12/M tokens output on OpenRouter.

GLM 5.1, from Z.ai, has a 204,800-token context window and is priced at $0.896/M tokens input, $2.816/M tokens output on OpenRouter.

Context window

• Nano Banana Pro (Gemini 3 Pro Image): 131,072 tokens
• GLM 5.1: 204,800 tokens

Price

• Nano Banana Pro (Gemini 3 Pro Image): $2/M tokens input, $12/M tokens output
• GLM 5.1: $0.896/M tokens input, $2.816/M tokens output

Provided by

• Nano Banana Pro (Gemini 3 Pro Image): Google
• GLM 5.1: Z.ai

• Nano Banana Pro (Gemini 3 Pro Image) model details, providers and pricing
• GLM 5.1 model details, providers and pricing