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Google: Gemini 3.1 Flash Lite Preview (Reasoning)

google/gemini-3.1-flash-lite-preview-reasoning

Google: Gemini 3.1 Flash Lite Preview (Reasoning) is a 1,048,576-token model served on Composite at $0.156 per million tokens in and $0.938 per million tokens out.

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Specifications

Specifications and pricing as served by Composite
Model IDgoogle/gemini-3.1-flash-lite-preview-reasoning
ProviderGoogle AI Studio
Context window1,048,576 tokens
Acceptstext, image, video, file, audio
Returnstext
Input price$0.156 per million tokens
Output price$0.938 per million tokens
Prompt cachingSupported — cached input is billed at the provider's cache rate, on credits and plans alike
Image input$1.6e-7 per image
Audio input$3.1e-7 per second
Reasoning tokens$0.938 per million tokens
Web search$0.0175 per result
ThinkingOptional - see "Google: Gemini 3.1 Flash Lite Preview (Reasoning) (Reasoning)" in the catalog to turn it on by default
ModeratedNo
Cost on a monthly planAbout 1.8 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

$0.156 per million tokens input · $0.938 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 1.8 plan credits, at the provider's own price.

Provider

Google AI Studio

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 3.1 Flash Lite Preview is Google's high-efficiency model optimized for high-volume use cases. It outperforms Gemini 2.5 Flash Lite on overall quality and approaches Gemini 2.5 Flash performance across...

Supplied by Google AI Studio, not written by Composite.