Nano Banana Pro

google/gemini-3-pro-image

Nano Banana Pro on Sylphx Models · 66K of context. One Responses contract, with list prices published per million tokens.

Released: May 28, 2026 · 122 days old
Provider: Google
Context: 65,536 tokens

Get an API key See a request sample Read the docs

Input $2.31 / MOutput $120.00 / MCached input $0.231 / MFull rate sheet

Context window65,536tokens per request

Max output32,768tokens per response

Input$2.31 / Mper million tokens

Output$120.00 / Mper million tokens

Cached input$0.231 / M90% off input

ReleasedMay 28, 2026122 days old

Pricing

USD per million tokens

Input: $2.31
Output: $120.00
Cached input: $0.231

$31.73 for 750,000 input and 250,000 output tokens.

Assumption: one batch of 750,000 input plus 250,000 output tokens at the published list prices — recompute for your own mix. Blended $31.733 per million at a 3:1 mix.

Chat replies · 3:1 input:output: $31.733 / M
Long documents · 9:1 input:output: $14.079 / M
Heavy output · 1:1 input:output: $61.155 / M
Cache write: $0.4331 / M
Currency and unit: USD / million tokens

Cached input reads cost 90% less than fresh input tokens.

Full rate sheet and billing rules.

Specification

Context window: 65,536 tokens
Max output: 32,768 tokens
Input modalities: Not published
Output modalities: Not published
Family: Gemini Pro
Version: v3
Provider: Google
Released: May 28, 2026 · 122 days old
Model id: google/gemini-3-pro-image

Data posture

Standard

By default, prompts and outputs sent to this model are not used to train models. Training-discount lanes only with opt-in (x-sylphx-zdr: optional).

Training on what you send · default: No
Zero Data Retention · default: Yes
Training-discount lanes: Opt-in only · x-sylphx-zdr: optional

POST https://api.sylphx.ai/v1/responses

curl https://api.sylphx.ai/v1/responses \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3-pro-image",
    "input": "Summarise this incident report in three bullets.",
    "stream": false
  }'

How to call it

Send the official Responses document to the base URL above with your Sylphx API key and this exact model id. Streaming arrives as ordered events with one terminal event.

Retries: send an Idempotency-Key and a retry replays the original response instead of billing twice.
Errors: typed envelopes tell you whether to retry, wait, or fix the request.
Keys: create and revoke Sylphx API keys in the Sylphx console.

Quickstart Responses API Errors and retries

Related models

Derived from this catalog: same provider first, then the same family, then the nearest neighbours by input price and context window.

More from Google

Same provider

Elsewhere in Gemini Pro

Same family slug

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Nearest by input price and context window

Independent evaluation

We do not publish benchmark scores for this model — we have not verified any. These external leaderboards run their own tests, so check them against your own workload.

Not our numbers

Every Google model →