Nano Banana 2 (Gemini 3.1 Flash Image) vs Grok Imagine Image Quality: side-by-side summary

Nano Banana 2 (Gemini 3.1 Flash Image) and Grok Imagine Image Quality 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.

Grok Imagine Image Quality, from SpaceXAI, has a 65,536-token context window and is priced from $0.05/image on OpenRouter.

Context window

• Nano Banana 2 (Gemini 3.1 Flash Image): 131,072 tokens
• Grok Imagine Image Quality: 65,536 tokens

Price

• Nano Banana 2 (Gemini 3.1 Flash Image): $0.50/M tokens input, $3/M tokens output
• Grok Imagine Image Quality: from $0.05/image

Provided by

• Nano Banana 2 (Gemini 3.1 Flash Image): Google
• Grok Imagine Image Quality: SpaceXAI

• Nano Banana 2 (Gemini 3.1 Flash Image) model details, providers and pricing
• Grok Imagine Image Quality model details, providers and pricing