How much does Nano Banana 2 (gemini-3.1-flash-image) cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, Nano Banana 2 (gemini-3.1-flash-image) costs about $9,150 per month at Google's list prices ($0.50 per 1M input tokens, $60.00 per 1M output tokens).

Does Nano Banana 2 (gemini-3.1-flash-image) support prompt caching?

No cache read price is published for Nano Banana 2 (gemini-3.1-flash-image).

How long is Nano Banana 2 (gemini-3.1-flash-image)'s context window?

Nano Banana 2 (gemini-3.1-flash-image) accepts up to 131,072 tokens (131K) of context and returns up to 32,768 tokens per response.

Nano Banana 2 (gemini-3.1-flash-image) API Pricing

Google · released May 28, 2026 · 131K context · API model ID gemini-3.1-flash-image

Nano Banana 2 (gemini-3.1-flash-image) by Google API pricing: $0.50 per 1M input tokens and $60.00 per 1M output tokens (provider list price via models.dev, Oct 10, 2026).

Prices

Nano Banana 2 (gemini-3.1-flash-image) prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$0.50
Output	$60.00
Cache read	Not published
Cache write	Not published

Google's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation

Estimated monthly cost

$9,150

per month

per day: $305.00
per request: $0.0305

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Compare this workload across models

Monthly cost by workload

Workload	Per month
Chatbot1,000 in / 500 out tokens, 10,000 requests a day	$9,150/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$5,100/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$4,350/mo

Context and capabilities

Context: 131,072 tokens
Max output: 32,768 tokens
Input: text, image, video, pdf
Output: text, image
Knowledge cutoff: January 2025
Open weights: No
Tool calling: No
Reasoning: Yes
Structured outputs: No

Capabilities and limits as listed by models.dev.

Similarly priced models

GPT-6 Astra · $10.00 in / $50.00 out
Claude Opus 5.5 · $4.00 in / $20.00 out
Kimi K3 · $3.00 in / $15.00 out
Gemini 3.1 Pro Preview · $2.00 in / $12.00 out

Price history

No price changes since we started tracking on Oct 8, 2026.

Questions

How much does Nano Banana 2 (gemini-3.1-flash-image) cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, Nano Banana 2 (gemini-3.1-flash-image) costs about $9,150 per month at Google's list prices ($0.50 per 1M input tokens, $60.00 per 1M output tokens).
Does Nano Banana 2 (gemini-3.1-flash-image) support prompt caching?: No cache read price is published for Nano Banana 2 (gemini-3.1-flash-image).
How long is Nano Banana 2 (gemini-3.1-flash-image)'s context window?: Nano Banana 2 (gemini-3.1-flash-image) accepts up to 131,072 tokens (131K) of context and returns up to 32,768 tokens per response.