Nano Banana 2 (Gemini 3.1 Flash Image) vs GLM 5.3: side-by-side summary

Nano Banana 2 (Gemini 3.1 Flash Image) and GLM 5.3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Nano Banana 2 (Gemini 3.1 Flash Image), from Google, has a 131,072-token context window and is priced at $0.50/M tokens input, $3/M tokens output on OpenRouter.

GLM 5.3, from Z.ai, has a 1,048,576-token context window and is priced at $1.40/M tokens input, $4.40/M tokens output on OpenRouter.

Context window

• Nano Banana 2 (Gemini 3.1 Flash Image): 131,072 tokens
• GLM 5.3: 1,048,576 tokens

Price

• Nano Banana 2 (Gemini 3.1 Flash Image): $0.50/M tokens input, $3/M tokens output
• GLM 5.3: $1.40/M tokens input, $4.40/M tokens output

Provided by

• Nano Banana 2 (Gemini 3.1 Flash Image): Google
• GLM 5.3: Z.ai

• Nano Banana 2 (Gemini 3.1 Flash Image) model details, providers and pricing
• GLM 5.3 model details, providers and pricing