Nano Banana Pro (Gemini 3 Pro Image Preview) vs GPT-5.2 Chat: side-by-side summary

Nano Banana Pro (Gemini 3 Pro Image Preview) and GPT-5.2 Chat 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 Preview), from Google, has a 65,536-token context window and is priced at $2/M tokens input, $12/M tokens output on OpenRouter.

GPT-5.2 Chat, from OpenAI, has a 128,000-token context window and is priced at $1.75/M tokens input, $14/M tokens output on OpenRouter.

Context window

• Nano Banana Pro (Gemini 3 Pro Image Preview): 65,536 tokens
• GPT-5.2 Chat: 128,000 tokens

Price

• Nano Banana Pro (Gemini 3 Pro Image Preview): $2/M tokens input, $12/M tokens output
• GPT-5.2 Chat: $1.75/M tokens input, $14/M tokens output

Provided by

• Nano Banana Pro (Gemini 3 Pro Image Preview): Google
• GPT-5.2 Chat: OpenAI

• Nano Banana Pro (Gemini 3 Pro Image Preview) model details, providers and pricing
• GPT-5.2 Chat model details, providers and pricing