Nano Banana (Gemini 2.5 Flash Image) vs Grok 4.1 Fast: side-by-side summary

Nano Banana (Gemini 2.5 Flash Image) and Grok 4.1 Fast are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Nano Banana (Gemini 2.5 Flash Image), from Google, has a 32,768-token context window and is priced at $0.30/M tokens input, $2.50/M tokens output on OpenRouter.

Grok 4.1 Fast, from SpaceXAI, has a 2,000,000-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Nano Banana (Gemini 2.5 Flash Image): 32,768 tokens
• Grok 4.1 Fast: 2,000,000 tokens

Price

• Nano Banana (Gemini 2.5 Flash Image): $0.30/M tokens input, $2.50/M tokens output
• Grok 4.1 Fast: Pricing varies by provider

Provided by

• Nano Banana (Gemini 2.5 Flash Image): Google
• Grok 4.1 Fast: SpaceXAI

• Nano Banana (Gemini 2.5 Flash Image) model details, providers and pricing
• Grok 4.1 Fast model details, providers and pricing