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Google: Gemini 3 Flash Preview (Reasoning)

google/gemini-3-flash-preview-reasoning

Google: Gemini 3 Flash Preview (Reasoning) is a 1,048,576-token model served on Composite at $0.313 per million tokens in and $1.88 per million tokens out.

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Specifications

Specifications and pricing as served by Composite
Model IDgoogle/gemini-3-flash-preview-reasoning
ProviderGoogle
Context window1,048,576 tokens
Acceptstext, image, file, audio, video
Returnstext
Input price$0.313 per million tokens
Output price$1.88 per million tokens
Prompt cachingSupported — cached input is billed at the provider's cache rate, on credits and plans alike
Image input$3.1e-7 per image
Audio input$6.2e-7 per second
Reasoning tokens$1.88 per million tokens
Web search$0.0175 per result
ThinkingOptional - see "Google: Gemini 3 Flash Preview (Reasoning) (Reasoning)" in the catalog to turn it on by default
ModeratedNo
Cost on a monthly planAbout 3.5 plan credits per typical call (8k in, 1k out)
Routing endpoints1

Measured on Composite

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.

Pricing

$0.313 per million tokens input · $1.88 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 3.5 plan credits, at the provider's own price.

Provider

Google

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 1,048,576-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 is priced low enough for high-volume daily roleplay without the per-message cost adding up quickly.

From the provider

Gemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance. It delivers near Pro level reasoning and tool...

Supplied by Google, not written by Composite.