Nano Banana Pro (Gemini 3 Pro Image) vs GPT-5.6 Luna: side-by-side summary

Nano Banana Pro (Gemini 3 Pro Image) and GPT-5.6 Luna 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.

GPT-5.6 Luna, from OpenAI, has a 1,050,000-token context window and is priced at $0.20/M tokens input, $1.20/M tokens output on OpenRouter.

Context window

• Nano Banana Pro (Gemini 3 Pro Image): 131,072 tokens
• GPT-5.6 Luna: 1,050,000 tokens

Price

• Nano Banana Pro (Gemini 3 Pro Image): $2/M tokens input, $12/M tokens output
• GPT-5.6 Luna: $0.20/M tokens input, $1.20/M tokens output

Provided by

• Nano Banana Pro (Gemini 3 Pro Image): Google
• GPT-5.6 Luna: OpenAI

• Nano Banana Pro (Gemini 3 Pro Image) model details, providers and pricing
• GPT-5.6 Luna model details, providers and pricing