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gemini-3.1-flash-lite

GoogleChatReasoningVision
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gemini-3.1-flash-lite

Lightweight multimodal model for high-frequency translation and structured extraction

Gemini 3.1 Flash-Lite is a multimodal model from Google designed for high-frequency, lightweight tasks, with a focus on both low latency and cost efficiency. It is suitable for organizing messages, comments, images, and documents into translations, labels, summaries, or structured data, and also supports adding reasoning as needed for the task. For business workflows with clear boundaries that require repeated processing, it is more targeted than models designed for lengthy, in-depth analysis.

GoogleModel brand
ChatModel type
Reasoning, visual understandingTask capabilities
STANDARD APIs · QUICK SETUP

Keep your SDK. Connect in minutes.

Point the Base URL to api.acedata.cloud, configure your platform API key and the model ID below, and use your compatible SDK or client.

API hostapi.acedata.cloud
modelgemini-3.1-flash-lite
OpenAI Python SDK
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["ACEDATACLOUD_API_KEY"],
    base_url="https://api.acedata.cloud/v1",
)
response = client.chat.completions.create(
    model="gemini-3.1-flash-lite",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Choose an available protocol for this model. OpenAI SDK uses a Base URL ending in /v1; Anthropic SDK uses the root URL. See each guide for protocol-specific parameters, tools and response formats.

Specifications and interface features

Clarify capacity, inputs and outputs, and invocation methods before choosing a model.

Version identity
Stable Gemini 3.1 Flash-Lite; invocation ID: gemini-3.1-flash-lite
Native input limit
1,048,576 tokens
Native output limit
65,536 tokens
Native inputs and outputs
Text, image, video, audio, and PDF input; text output
Structured processing
Native support for structured output, function calling, and Thinking
Image and text invocation
/gemini/chat/completions: combine text and image_url in messages; supports streaming text responses
Files and conversations
/aichat2/conversations: text, images, and file_url messages; supports saving and continuing conversations

Native specifications describe model capabilities; use this platform's message format, file handling, and conversation operations according to the selected entry point.

Core Capabilities

Learn what gemini-3.1-flash-lite can bring to your work.

Keep repetitive language tasks concise

Flash-Lite focuses on clear, repetitive language processing, such as translating customer service messages, condensing review summaries, and categorizing tickets. Prompts can specify the target language, terminology, and output boundaries, requiring only translations or labels to be returned, reducing irrelevant explanations and making results easy to pass directly to downstream business applications.

Turn natural language into business fields

The model supports structured output and is suitable for extracting review aspects, sentiment, key original sentences, and return intent. First define field meanings and allowed values, then require responses according to a JSON Schema, so the same batch of inputs uses a consistent structure; missing information should remain empty rather than asking the model to fill in facts.

Multimodal understanding and on-demand reasoning

It can combine images and text for content understanding, and can add reasoning for tasks that require step-by-step judgment. It also natively supports audio transcription and PDF summarization. It is suitable for combining recognition, extraction, and brief judgment; simple labeling tasks do not need lengthy explanations, while complex judgments should be given a more generous generation budget.

Use Cases

Start with specific tasks to find where the model can be effective.

Multilingual customer service content organization

Provide customer messages, the target language, and a brand glossary, and deliver translations without additional commentary; a separate pass can output issue types and brief summaries. Suitable for chat messages, reviews, and ticket queues, it makes translation and classification independently verifiable steps, avoiding the need to pack all business decisions into a single response.

Structured analysis of e-commerce reviews

Provide product reviews and field definitions to extract the evaluated attributes, sentiment, original excerpts, and whether returns are mentioned, delivering consistent JSON. Applications can use this to aggregate sizing, material, or shipping issues; for actual actions such as refunds, business rules should decide rather than allowing sentiment judgments to directly trigger execution.

Initial document screening and chart summaries

Submit file links through the conversation interface, or attach page screenshots in image-and-text messages, and request topics, key items, and questions requiring confirmation. The deliverables are suitable for document catalog summaries and human reading checklists; for table figures, dates, and conditional clauses, you can require original excerpts to be retained for item-by-item review.

How to Choose This Model

Choose based on task complexity, input materials, and expected results.

Choose Flash-Lite First When the Task Is Clear

When the task is translation, classification, extraction, or short summarization, and the input and output rules can be clearly defined, Gemini 3.1 Flash-Lite is a suitable lightweight choice. If open-ended planning, in-depth debugging, or multi-step comprehensive analysis is needed, consider Flash or Pro. The trade-off here is task positioning; it does not mean every problem has a fixed quality gap.

Choose the Stable Identity and Access Method Separately

Use gemini-3.1-flash-lite for calls; do not add a preview suffix yourself. Choose Chat Completions when you already have message history or need to handle tool results or JSON output yourself; choose AI Chat v2 when you want to save conversations, submit file links, and continue asking follow-up questions. The two differ in how they are used, not as two separate models.

Getting Started

From a small-scale task to production integration.

01

Prepare the Task and Materials

Define the objective, required inputs, and output requirements, using real business examples as a starting point.

02

Try It in the API Playground

Open the trial page, confirm the parameters supported by this access method, then submit a small-scale task to review the results.

03

Integrate According to the API Documentation

Keep the full model ID, use the request format specified in the documentation, and confirm billing rules on the Pricing page.

Usage Limits

Understand output quality and capability boundaries before formal use.

  • It is a text-output understanding model. It does not generate images or audio, and it does not support the Live API or native computer control. Being able to understand audio does not mean it can synthesize speech, and being able to return tool calls does not mean it automatically has permission to execute them; workflows requiring actual operations should configure tools and check execution results.
  • Native multimodal scope does not mean that all materials use the same submission format. Image-and-text messages in Chat Completions use text and image_url; files such as PDFs can be submitted through AI Chat v2 using file_url. Do not directly treat video examples from other models as the audio/video submission method for this model.
  • A long input limit does not guarantee that every detail will be extracted accurately. For multiple documents, dense tables, or conflicting comments, it is recommended to narrow the questions, retain the original wording, and validate key fields. Flash-Lite is better suited for initial screening and lightweight processing; complex conclusions should receive further analysis rather than simply increasing output length.

Frequently Asked Questions

Answers to common questions when using gemini-3.1-flash-lite.

Is Gemini 3.1 Flash-Lite a stable release or a preview?

This refers to the stable Gemini 3.1 Flash-Lite release, with the invocation ID gemini-3.1-flash-lite. Do not change the name to a form containing preview, and do not confuse it with Gemini 3.1 Pro or image generation models; these models have different task positioning and capability boundaries.

Can it read PDFs? How should they be submitted?

The native model supports PDF understanding. On this platform, you can use /aichat2/conversations, place the file link in a file_url content block, and include a summary or extraction requirements. When using Chat Completions, you can submit document text or page images; do not treat a PDF link as a regular image field.

Can it view images and return JSON at the same time?

You can design structured extraction tasks around image and text inputs: combine text requirements with image_url in messages, then use response_format to specify a JSON Schema. This is suitable for extracting page fields or image content labels; the application should still check field types, missing values, and key numbers, and must not equate correct formatting with factual correctness.

When should Thinking be used?

Thinking is supported natively and is suitable for tasks that require step-by-step judgment and condition comparison. For simple translation or label processing, you should usually clarify the rules first, then consider adding thinking. Chat Completions provides the reasoning_effort field, which differs in name from the native thinking_level; do not directly copy native configuration objects.

How do I continue document Q&A from the previous turn?

When using AI Chat v2, enable stateful and include the returned id in subsequent requests to continue asking follow-up questions within the same conversation; regular JSON responses include answer and id. When using Chat Completions, the client maintains the messages history; both approaches should avoid adding material unrelated to the current question.

Model information · Updated: 2026-10-01. For invocation parameters and billing rules, see the API and pricing sections.