Google: Nano Banana Pro (Gemini 3 Pro Image) is a 131,072-token model served on Composite at $2.50 per million tokens in and $15.0 per million tokens out.
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Specifications
Specifications and pricing as served by Composite
Model ID
google/gemini-3-pro-image
Provider
cv11
Context window
131,072 tokens
Accepts
image, text
Returns
image, text
Input price
$2.50 per million tokens
Output price
$15.0 per million tokens
Prompt caching
Supported — cached input is billed at the provider's cache rate, on credits and plans alike
Image input
$0.0000025 per image
Audio input
$0.0000025 per second
Image output
$0.00015 per image
Reasoning tokens
$15.0 per million tokens
Web search
$0.0175 per result
Thinking
Always on for this model
Moderated
No
Cost on a monthly plan
About 28 plan credits per typical call (8k in, 1k out)
Routing endpoints
2 (base plus 1 routing variant)
Use Google: Nano Banana Pro (Gemini 3 Pro Image) in JanitorAI or SillyTavern
Make a Composite API key and type google/gemini-3-pro-image as the model name. JanitorAI takes the full URL https://composite.lucidity.sh/v1/chat/completions; SillyTavern, ChubAI, Agnai and RisuAI take https://composite.lucidity.sh/v1. It runs on credits, a plan, or your own provider key.
This model has not carried enough traffic on Composite yet to publish a success rate, a latency figure or a traffic rank. The numbers appear here once it has.
Routing variants
The same model behind 1 alternative endpoint. Call the id directly to pin a route; the base id above picks for you.
Route
Model ID
Provider
Price
cheapThink
google/gemini-3-pro-image:cheapThink
cv11
$2.50 per million tokens input · $15.0 per million tokens output
Pricing
$2.50 per million tokens input · $15.0 per million tokens output
Credits pay the provider’s price plus 25%; cache hits cost less.
On a monthly plan, a typical call (8k tokens in, 1k out) uses about 28 plan credits, at the provider's own price.
Provider
cv11
Roleplay fit
Gemini models combine large context windows with fast throughput, which keeps response times low even in busy group chats.
Context behavior
With a 131,072-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
Cost for regular use
It sits in the mid-range on price, a reasonable pick for regular roleplay use without going for the cheapest option available.
From the provider
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...