Overview
GPT-5 Image Mini vs Nano Banana Pro (Gemini 3 Pro Image Preview): side-by-side summary
GPT-5 Image Mini and Nano Banana Pro (Gemini 3 Pro Image Preview) are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5 Image Mini, from OpenAI, has a 400,000-token context window and is priced at $2.50/M tokens input, $8/M tokens output on OpenRouter.
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, $120/M tokens output on OpenRouter.
- Context window
- GPT-5 Image Mini: 400,000 tokens
- Nano Banana Pro (Gemini 3 Pro Image Preview): 65,536 tokens
- Price
- GPT-5 Image Mini: $2.50/M tokens input, $8/M tokens output
- Nano Banana Pro (Gemini 3 Pro Image Preview): $2/M tokens input, $120/M tokens output
- Provided by
- GPT-5 Image Mini: OpenAI
- Nano Banana Pro (Gemini 3 Pro Image Preview): Google