# Gemini 3.1 Flash Lite Preview API Pricing

As of October 10, 2026, Gemini 3.1 Flash Lite Preview costs $0.25 per 1M input tokens and $1.50 per 1M output tokens on Google AI Studio, with cache reads at $0.025 per 1M tokens. It has a 1,048,576-token context window and returns up to 65,536 tokens per response.

- Page: https://models.litellm.ai/models/gemini-3.1-flash-lite-preview
- Lab: Google
- LiteLLM model name: `gemini/gemini-3.1-flash-lite-preview`
- Context window: 1,048,576 tokens
- Max output: 65,536 tokens
- Added to LiteLLM: March 2026
- Deprecation date: May 25, 2026
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| Google AI Studio | `gemini/gemini-3.1-flash-lite-preview` | $0.25 | $1.50 | $0.025 | – | – | 1M |
| Google Vertex AI | `vertex_ai/gemini-3.1-flash-lite-preview` | $0.25 | $1.50 | $0.025 | – | – | 1M |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- Google AI Studio: $1.25
- Google Vertex AI: $1.25
- Google AI Studio batch: $0.625

100 long-document requests with 100,000 input and 2,000 output tokens each:

- Google AI Studio: $2.80
- Google Vertex AI: $2.80

## Features

Supported: Function calling, Parallel tool calls, Structured output, Image input, PDF input, Audio input, Video input, Reasoning, Prompt caching, Web search.
Not supported: Audio output.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="gemini/gemini-3.1-flash-lite-preview",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does Gemini 3.1 Flash Lite Preview cost?

Gemini 3.1 Flash Lite Preview costs $0.25 per 1M input tokens and $1.50 per 1M output tokens on Google AI Studio, with cache reads at $0.025 per 1M tokens. Batch requests cost $0.125 per 1M input tokens and $0.75 per 1M output tokens.

### What is the context window of Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview has a 1,048,576-token context window and returns up to 65,536 tokens per response.

### Which providers offer Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview is available from 2 providers through LiteLLM: Google AI Studio and Google Vertex AI.

### How do I call Gemini 3.1 Flash Lite Preview with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="gemini/gemini-3.1-flash-lite-preview", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does Gemini 3.1 Flash Lite Preview support?

Gemini 3.1 Flash Lite Preview supports function calling, parallel tool calls, structured output, image input, PDF input, audio input, video input, reasoning, prompt caching and web search. It does not support audio output.

### When did LiteLLM add Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview was added to LiteLLM's model price file in March 2026.

### Is Gemini 3.1 Flash Lite Preview being deprecated?

Google AI Studio deprecated gemini/gemini-3.1-flash-lite-preview on May 25, 2026.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json