Nano Banana 2 (Gemini 3.1 Flash Image) vs GPT-5.6 Terra: side-by-side summary

Nano Banana 2 (Gemini 3.1 Flash Image) and GPT-5.6 Terra 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.

GPT-5.6 Terra, from OpenAI, has a 1,050,000-token context window and is priced at $2/M tokens input, $12/M tokens output on OpenRouter.

Context window

• Nano Banana 2 (Gemini 3.1 Flash Image): 131,072 tokens
• GPT-5.6 Terra: 1,050,000 tokens

Price

• Nano Banana 2 (Gemini 3.1 Flash Image): $0.50/M tokens input, $3/M tokens output
• GPT-5.6 Terra: $2/M tokens input, $12/M tokens output

Provided by

• Nano Banana 2 (Gemini 3.1 Flash Image): Google
• GPT-5.6 Terra: OpenAI

• Nano Banana 2 (Gemini 3.1 Flash Image) model details, providers and pricing
• GPT-5.6 Terra model details, providers and pricing