# Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite is a text generation model from Google, available through the Impossibl API. Its published context window is 1,000,000 tokens. The advertised input rate is $0.25 per million input tokens. The advertised output rate is $1.50 per million output tokens.

- Model identifier: ` google/gemini-3.1-flash-lite `
- Creator: Google
- Model type: Text generation
- Canonical model page: [Gemini 3.1 Flash-Lite](<https://impossibl.com/google/gemini-3.1-flash-lite>)
- API availability: Listed as serving through Impossibl.
- Creator release date: 2026-05-07

## Capabilities and limits

- Context window: 1,000,000 tokens
- Maximum output tokens: Not published in the public catalog; this is separate from the context window.
- Inputs: text, image, audio, video
- Outputs: text
- Tool calling: Not published

## API access

Use ` google/gemini-3.1-flash-lite ` as the model identifier through the Impossibl API.

Published API endpoints:

- ` /v1/chat/completions `

[API quickstart](<https://impossibl.com/docs/agent-quickstart>) · [Models and billing documentation](<https://impossibl.com/docs/models>)

## Published API prices

All rates are in USD. An unpublished rate is unknown, not zero. Workspace-specific pricing, taxes, balance-purchase fees, billing adjustments, and tool charges can affect the amount paid.

| Usage | Published base rate | Billing unit |
| --- | --- | --- |
| Input | $0.25 | per million input tokens |
| Output | $1.50 | per million output tokens |
| Cache read | $0.025 | per million cached input tokens |
| Cache write (default retention) | Not published | per million tokens |
| Cache write (one-hour retention) | Not published | per million tokens |
| Audio input | $0.50 | per million audio input tokens |

## Independent benchmarks

Source: [Artificial Analysis](<https://artificialanalysis.ai/>). Last checked: 2026-09-11T11:21:18.106Z.
Configurations are evaluated separately. API scores retain their original units. Unmeasured scores are omitted.

### Gemini 3.1 Flash-Lite

Source: [Evaluation source](<https://artificialanalysis.ai/models/gemini-3-1-flash-lite-preview>)

| Benchmark | Score |
| --- | --- |
| Intelligence Index | 16.03 |
| Omniscience Index | -16.42 |
| GPQA | 82.22% |
| Humanity’s Last Exam | 17.19% |
| SciCode | 43.40% |
| CritPt | 1.14% |
| Terminal-Bench v2.1 | 31.09% |
| Terminal-Bench v4.0 | 0.51% |
| Terminal-Bench Hard | 24.24% |
| AA-LCR | 74.33% |
| Multilingual LCR | 6.11% |
| Harvey LAB | 31.15% |
| GDPval Elo | 595.99 |
| GDP.pdf All-pass | 7.80% |
| AutomationBench Partial | 6.80% |
| AnalystAgent | 8.75% |
| MMMU-Pro | 75.55% |
| IFBench | 77.21% |
| Tau2 | 31.29% |
| Tau Banking | 9.69% |
| APEX-Agents | 12.17% |
| coding index (API) | 34.7 |
| agentic index (API) | 3.2 |
| intelligence index (API) | 16 |

Full benchmark data and breakdowns: [Complete benchmark snapshot](<https://api.impossibl.com/v1/models/google/gemini-3.1-flash-lite/benchmarks>).


## Availability and retirement

The model is listed as serving. No retirement is announced in the current public catalog.

## Frequently asked questions

### What is Gemini 3.1 Flash-Lite?

Gemini 3.1 Flash-Lite is a text-generation model from Google, available through the Impossibl API.

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

Gemini 3.1 Flash-Lite costs $0.25 per million input tokens and $1.50 per million output tokens through the Impossibl API. Cache reads cost $0.025 per million tokens. Audio input costs $0.50 per million audio input tokens. All rates are in USD.

### What is the context length of Gemini 3.1 Flash-Lite?

Gemini 3.1 Flash-Lite has a 1,000,000-token context window through the Impossibl API.

### What inputs and outputs does Gemini 3.1 Flash-Lite support?

Gemini 3.1 Flash-Lite accepts text, image, audio, and video as input. Gemini 3.1 Flash-Lite returns text.

### How do I use Gemini 3.1 Flash-Lite through an API?

Gemini 3.1 Flash-Lite is available through the Impossibl API. Use google/gemini-3.1-flash-lite as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

### When was Gemini 3.1 Flash-Lite released?

Google released Gemini 3.1 Flash-Lite on May 7, 2026.

Sources: [Creator release announcement](<https://ai.google.dev/gemini-api/docs/changelog>)

## Sources and related links

Prices, limits, capabilities, endpoints, and availability come from the public Impossibl catalog. Creator documentation supplies descriptions and release dates where available; it does not override the published API offering.

- [Public Impossibl model catalog](<https://api.impossibl.com/v1/models>)
- [Full model directory as JSON](<https://impossibl.com/models.json>)
- [Gemini 3.1 Flash-Lite: model details and pricing](<https://impossibl.com/google/gemini-3.1-flash-lite>)
- [Model directory](<https://impossibl.com/models>)