Gemini 3.1 Flash Lite Preview
VerifiedGoogle's efficient multimodal preview for fast, large-context AI tasks.
About Gemini 3.1 Flash Lite Preview
Designed with an emphasis on speed, the model balances multimodal processing across multiple input types while keeping resource demands low. Its architecture supports extended context to maintain coherence over long inputs. As a preview release, it provides early access to refinements in Google's Gemini family.
Strengths include seamless handling of mixed media and a context capacity that accommodates lengthy documents or conversations. The non-open weights allow Google to deliver controlled updates and consistent performance. This setup favors reliability over customization for end users.
Common applications range from media analysis and content generation to building interactive tools that combine audio, video, and text. Enterprises use it for scalable tasks where efficiency and broad input support matter most. Developers integrate the model into prototypes needing quick multimodal responses.
Capabilities
How Gemini 3.1 Flash Lite Preview compares
Gemini 3.1 Flash Lite Preview (striped bar) vs other multimodal on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Gemini 3.1 Flash Lite Preview ranks #39 of 122
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long-form multimodal document analysis
Processes entire reports or books containing text and embedded images or charts within its 1,048,576-token context for comprehensive summarization or extraction.
Video content understanding tasks
Handles sequences of image frames alongside text prompts to generate descriptions, detect events, or answer questions about extended video material.
Integrated data reasoning workflows
Combines large volumes of mixed media inputs for scenarios like reviewing legal files that include scanned documents, diagrams, and transcripts in one pass.
Strengths & limitations
Strengths
- +Broad native support for multiple modalities
- +Very large context window for document and media tasks
- +Lightweight design optimized for speed
- +Unified handling of video, audio and files
Limitations
- –Preview model may show inconsistent behavior
- –Lite variant trades depth for efficiency
- –Experimental features can be less reliable than stable releases
Cost calculator
Estimate what Gemini 3.1 Flash Lite Preview would cost for your usage.
Based on Gemini 3.1 Flash Lite Preview's $0.25/1M input · $1.50/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "google/gemini-3.1-flash-lite-preview",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: google/gemini-3.1-flash-lite-preview
Editor's verdict
Gemini 3.1 Flash Lite Preview is Google's proprietary multimodal with a 1049K-token context window.
At $1.50 per 1M output tokens, it is mid-priced for its class.
It is available through Google's API and aggregators like OpenRouter.
Best suited to broad native support for multiple modalities and very large context window for document and media tasks.
Frequently asked questions
The model supports a context length of 1,048,576 tokens.
User reviews
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