Claude Sonnet 4 vs Gemini 2.5 Flash Image Preview (Nano Banana): side-by-side summary

Claude Sonnet 4 and Gemini 2.5 Flash Image Preview (Nano Banana) are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Sonnet 4, from Anthropic, has a 1,000,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.

Gemini 2.5 Flash Image Preview (Nano Banana), from Google, has a 32,768-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Claude Sonnet 4: 1,000,000 tokens
• Gemini 2.5 Flash Image Preview (Nano Banana): 32,768 tokens

Price

• Claude Sonnet 4: $3/M tokens input, $15/M tokens output
• Gemini 2.5 Flash Image Preview (Nano Banana): Pricing varies by provider

Provided by

• Claude Sonnet 4: Anthropic
• Gemini 2.5 Flash Image Preview (Nano Banana): Google

• Claude Sonnet 4 model details, providers and pricing
• Gemini 2.5 Flash Image Preview (Nano Banana) model details, providers and pricing