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Google: Gemini 3.8 Flash vs Google: Nano Banana 2.1

Google: Gemini 3.8 Flash is 1.8× cheaper for the sample workload; Google: Gemini 3.8 Flash has the larger context window.

MetricGoogle: Gemini 3.8 FlashGoogle: Nano Banana 2.1
Model IDgoogle/gemini-3.8-flashgoogle/gemini-nano-banana-2.1
Prompt price$0.825 / 1M tokens$1.50 / 1M tokens
Completion price$4.125 / 1M tokens$7.50 / 1M tokens
Context1,048,576 tokens65,536 tokens
Tool calling✓✓
Structured outputs✓✓
Reasoning✓✓
Response format✓✓
Web search––
Input modalitiestext, image, video, file, audioimage, text
Output modalitiestextimage, text
Added2026-09-022026-10-06

Sample workload

Chat app: 1,000 prompt + 500 completion tokens × 100 requests per day.

CostGoogle: Gemini 3.8 FlashGoogle: Nano Banana 2.1
Per day$0.29$0.53
Per 30 days$8.66$15.75

Difference: $0.24 per day and $7.09 per 30 days.

Data updated 2026-10-30