Google: Nano Banana (Gemini 2.5 Flash Image) API Pricing
Google: Nano Banana (Gemini 2.5 Flash Image) costs $0.300 per 1M input tokens and $2.50 per 1M output tokens (cache reads: $0.030). Context window: 33K. Prices verified 2026-10-21 · source
Alternatives to consider
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Token economics
| Token type | Price | vs base input |
|---|---|---|
| Standard input | $0.300 | — |
| Cache read | $0.030 | −90% |
| Cache write (5m) | $0.083 | -72% |
| Output | $2.50 | — |
| Web search tool | $14/1k searches | — |
Prompt caching stores repeated context server-side: reads cost far less, but writes carry a one-time premium.
Training data ends here — newer events require retrieval or web search.
What would Google: Nano Banana (Gemini 2.5 Flash Image) cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $12.40 |
| Coding agent | 5,000 | 8,000 / 2,000 | $37.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $73.50 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $17.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Google: Nano Banana (Gemini 2.5 Flash Image)
Gemini 2.5 Flash Image, a.k.a. "Nano Banana," is now generally available. It is a state of the art image generation model with contextual understanding. It is capable of image generation,...
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Frequently asked questions
How much does Google: Nano Banana (Gemini 2.5 Flash Image) cost?
Google: Nano Banana (Gemini 2.5 Flash Image) costs $0.300 per 1M input tokens and $2.50 per 1M output tokens; cached input tokens cost $0.030 per 1M. Verified 2026-10-21 — provider source.
What is the context window?
33K tokens, with up to 8K output tokens per response. That's roughly 41 pages of text in a single request.
Does it support prompt caching?
Yes — cached input is $0.030/1M, about 90% cheaper than standard input. Agents and RAG workloads with repeated context benefit most.
What's a cheaper alternative?
ScaleDown: Summarize saves about 97% on a typical workload with comparable quality.
Official resources
- Google: Nano Banana (Gemini 2.5 Flash Image) on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- Gemini docs → — first-party model specifications and limits.
- LMArena leaderboard → — independent human-preference rankings.
- Shred your current bill — paste a CSV and see if switching saves money.