API MODEL PROFILE / google

Google: Nano Banana Pro (Gemini 3 Pro Image Preview)

google/gemini-3-pro-image-preview

Catalogue observation · 2026-09-22T10:10:29.140Z · Source: OpenRouter

imagetextCatalogue only · output not supported by the text API

About this API

Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and...

Provider-supplied description, not an independently validated performance claim.

Input / 1 million tokens$2Published prompt tariff

Output / 1 million tokens$12Published completion tariff

Context window65,536Published token capacity

These are the catalogue’s token tariffs. Image, audio, video, search and other charges may use different billing units. Zero token rates alone do not mean those services are free. See the complete pricing fields below and the source model page.

Pros and useful characteristics

Published input token pricing is at or below the median of catalogue entries with the same output modalities and known tariffs.
No separate per-request fee is listed in this catalogue observation. Other modality charges may apply.
The upstream model accepts image inputs according to its catalogue. This gateway currently accepts text only.

Cons and practical limits

Published output token pricing is above the same-modality catalogue median.
The published context window is 65,536 tokens; larger documents may need splitting.
Catalogue only · output not supported by the text API. View the source model page for its API requirements.
No independent latency, uptime, reasoning-quality or coding benchmark has been measured by this application.

Assessment uses published fields and unweighted price medians across 9 entries with the same output modalities and known tariffs. It is a cost-and-capability comparison, not a quality ranking or recommendation.

Observed price history

No observations yet. The chart starts with the first recorded data point.

One catalogue observation per hour. History begins when this deployment first observes the model. No backfilled or interpolated prices.

Published model tariffsUSD / 1M tokens

InputOutput

Google: Nano Banana Pro (Gemini 3 Pro Image Preview)

$2.00

$12.00

Zero baseline. Published token tariffs, not total multimodal cost or performance scores.

API availability

Catalogue only · output not supported by the text API.

Trident currently serves text Chat Completions with known token prices. This profile is available for discovery; use the upstream model’s documentation for other API formats and billing units.

Read the catalogue guide ↗

Technical profile

Canonical model: google/gemini-3-pro-image-preview-20251120
Separate request tariff: $0
Upstream output limit: 32,768
Gateway output limit: Not supported
Upstream inputs: image, text
Upstream outputs: image, text
Knowledge cutoff: Not published

Advertised upstream parameters

include_reasoningmax_tokensreasoningresponse_formatseedstopstructured_outputstemperaturetop_p

Upstream capabilities are separate from the text subset exposed by this gateway.

View source model page

Complete published pricing

Source fields are retained exactly, including extra charges and tier overrides. Negative values indicate variable pricing, not rebates. An absent field is not evidence that a service is free.

View OpenRouter pricing fields

{
  "prompt": "0.000002",
  "completion": "0.000012",
  "image": "0.000002",
  "image_output": "0.00012",
  "audio": "0.000002",
  "input_audio_cache": "0.0000002",
  "web_search": "0.014",
  "internal_reasoning": "0.000012",
  "input_cache_read": "0.0000002",
  "input_cache_write": "0.000000375"
}

View google profile ↗