Gemini 3.1 Flash Lite Preview

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 key capabilities. Improvements span audio input/ASR, RAG snippet ranking, translation, data extraction, and code completion. Supports full thinking levels (minimal, low, medium, high) for fine-grained cost/performance trade-offs. Priced at half the cost of Gemini 3 Flash.

google/gemini-3.1-flash-lite-preview

Organization: Google
Family: gemini-flash-lite
Providers: 9
Context: 1,048,576
Output limit: 65,536
Knowledge: 2025-01
Release: 2026-03-03
Updated: 2026-03-03
Weights: Closed
Input: text, image, video, audio, pdf
Output: text
Capabilities: Tools, Reasoning, Structured, Temperature

Providers

Compare every cataloged offer for this model, including its provider, route, token limits, price, and capabilities.

11 offers · USD per million tokens

Provider	Model ID	Context	Output	Input / output · 1M	Reasoning	Tools	Structured	Details
302.AI	gemini-3.1-flash-lite-preview	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Databricks	databricks-gemini-3-1-flash-lite	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Eden AI	google/gemini-3.1-flash-lite-preview	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Kilo Gateway	google/gemini-3.1-flash-lite-preview	1,048,576	65,536	$0.125 / $0.75	Yes	Yes	Yes	View
Merge Gateway	google/gemini-3.1-flash-lite-preview	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Neon	gemini-3-1-flash-lite	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Google AI Studiovia OpenRouter	google/gemini-3.1-flash-lite-preview unknown	1,048,576	65,536	$0.45 / $2.70	Yes	Yes	Yes	View
Google AI Studiovia OpenRouter	google/gemini-3.1-flash-lite-preview unknown	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Google AI Studiovia OpenRouter	google/gemini-3.1-flash-lite-preview unknown	1,048,576	65,536	$0.125 / $0.75	Yes	Yes	Yes	View
OrcaRouter	google/gemini-3.1-flash-lite-preview	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View
Vertex	gemini-3.1-flash-lite-preview	1,048,576	65,536	$0.25 / $1.50	Yes	Yes	Yes	View

Prices and limits apply to each offer. A dash means the value is not provided. OpenRouter offers show the hosting provider and routing channel separately.

Pricing

Compare token rates and cache charges across available routes and hosting configurations.

USD per million tokens

Input from$0.125Per 1M input tokens

Output from$0.75Per 1M output tokens

Available offers11Across 9 providers

Lowest listed input and output prices across the offers above; they may belong to different providers. These are base rates, before conditional pricing, discounts or additional fees.

Endpoint price comparisonLatest observed snapshot · 3 lowest-priced configurations

InputOutput

Google AI Studiogoogle-ai-studio/flex

$0.125$0.75

Google AI Studiogoogle-ai-studio

$0.25$1.50

Google AI Studiogoogle-ai-studio/priority

$0.45$2.70

google/gemini-3.1-flash-lite-previewObserved Oct 4, 2026, 11:31 AM UTC

Input: $0.25
Output: $1.50
Cache read: $0.025
Cache write: $0.083333

Additional fees and pricing conditions

audio: $0.0000005 / audio token
image: $0.00000025 / image
web search: $0.014 / search
input audio cache: $0.00000005 / audio token
internal reasoning: $0.0000015 / reasoning token

Hosting prices through OpenRouter All endpoints and cache rates

Endpoint	Input / 1M	Output / 1M	Cache read / 1M	Cache write / 1M
Google AI Studiogoogle-ai-studio/priority	$0.45	$2.70	$0.045	$0.15
Google AI Studiogoogle-ai-studio	$0.25	$1.50	$0.025	$0.083333
Google AI Studiogoogle-ai-studio/flex	$0.125	$0.75	$0.0125	$0.041667

Each row is a hosting configuration. Open an offer in Providers for its full pricing conditions and additional fees. Endpoint observations may differ from the routing catalog's base price.

Performance

Review reported latency and output-throughput percentiles from the latest observed rolling window.

Latest 30-minute observation

Time to first token · milliseconds

Latency distributionRolling 30-minute snapshot · 3 endpoints

P50P75P90P99

Google AI Studiogoogle-ai-studio/priority

304–1,734 ms

Google AI Studiogoogle-ai-studio

768–2,173.25 ms

Google AI Studiogoogle-ai-studio/flex

691–2,368.94 ms

All latency percentiles 3 endpoints

Endpoint	P50	P75	P90	P99
Google AI Studiogoogle-ai-studio/priority	304 ms	361 ms	816 ms	1,734 ms
Google AI Studiogoogle-ai-studio	768 ms	914 ms	1,095 ms	2,173.25 ms
Google AI Studiogoogle-ai-studio/flex	691 ms	838 ms	1,629.4 ms	2,368.94 ms

Output throughput · tokens per second

Throughput distributionRolling 30-minute snapshot · 3 endpoints

P50P75P90P99

Google AI Studiogoogle-ai-studio/priority

93–296 t/s

Google AI Studiogoogle-ai-studio

66–307 t/s

Google AI Studiogoogle-ai-studio/flex

114–317 t/s

All throughput percentiles 3 endpoints

Endpoint	P50	P75	P90	P99
Google AI Studiogoogle-ai-studio/priority	93 t/s	124.25 t/s	245.3 t/s	296 t/s
Google AI Studiogoogle-ai-studio	66 t/s	88 t/s	145 t/s	307 t/s
Google AI Studiogoogle-ai-studio/flex	114 t/s	154 t/s	197 t/s	317 t/s

Percentiles describe the observed request distribution. These are snapshots of a rolling window, not a historical time series.

Uptime

Compare successful request rates across the latest 5-minute, 30-minute, and 24-hour observations.

Successful requests by window

Availability by endpointCurrent overlapping windows · 3 endpoints

Endpoint5 minutes30 minutes24 hours

Google AI Studiogoogle-ai-studio/priorityObserved Oct 4, 2026, 11:31 AM UTC

100%

99.97%

Google AI Studiogoogle-ai-studioObserved Oct 4, 2026, 11:31 AM UTC

99.97%

99.95%

99.85%

Google AI Studiogoogle-ai-studio/flexObserved Oct 4, 2026, 11:31 AM UTC

100%

Reported by OpenRouter at the time of collection; rate-limited requests are excluded. A dash means no measurement was reported. This is not a live availability check.

Benchmarks

Review attributed evaluation results on each source's original scale.

External evaluations

google/gemini-3.1-flash-lite-previewObserved Oct 4, 2026, 11:31 AM UTC

Benchmark profileArtificial Analysis · shared source scale from 0 to 40

Coding

34.7

Agentic

1.6

Intelligence

15.6

Design Arena	Category	Elo	Win rate	Rank
models	3d	1,063	38.8%	95
models	asciiart	1,177	50.7%	29
models	codecategories	1,078	36.5%	98
models	dataviz	1,053	33.3%	102
models	gamedev	1,042	33.7%	105
models	svg	1,051	42.5%	71
models	uicomponent	1,078	37.7%	95
models	website	1,089	36.6%	101

Sources: Artificial Analysis and Design Arena, via OpenRouter. Scores retain their original scales and are not OpenAI Suite ratings.

Detailed evaluations

Evaluation	Configuration	Source	Results	Details
models · svg	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,051 Elo	Details
models · 3d	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,063 Elo	Details
models · codecategories	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,078 Elo	Details
Composite indices	Gemini 3.1 Flash-Litegoogle/gemini-3.1-flash-lite-preview-20260303	Artificial Analysis	Intelligence 15.6 · Coding 34.7 · Agentic 1.6	Details
models · uicomponent	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,078 Elo	Details
models · gamedev	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,042 Elo	Details
models · website	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,089 Elo	Details
models · dataviz	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,053 Elo	Details
models · asciiart	Gemini 3.1 Flash-Lite Previewgoogle/gemini-3.1-flash-lite-preview-20260303	Design Arena	1,177 Elo	Details

Sources: Artificial Analysis, Design Arena and OpenRouter. Evaluation configurations and scales differ; results are not interchangeable. Updated Oct 4, 2026.

Apps & session costs

Compare observed median session costs for applications using this model, grouped by conversation length.

30-day sample · through Sep 27, 2026

Application	Model route	Turns	Median cost / session	Details
Hermes Agent	google/gemini-3.1-flash-lite-preview-20260303	2–9 turns	$0.009198	Details
Hermes Agent	google/gemini-3.1-flash-lite-preview-20260303	1 turn	$0.001276	Details

Source: OpenRouter, as of Oct 2, 2026. Published under CC BY 4.0. These are observed costs per session, not token prices or a forecast for your workload. Apps are compared separately.

Activity

Daily prompt and completion tokens reported for this model's routes in OpenRouter's top 50. Missing days have no published value.

Last 90 complete UTC days

Daily token usage225,801,964,780 reported tokens · 11 days with observations

25B0

2026-07-07
24,462,510,406 tokens

2026-07-08
25,316,632,031 tokens

2026-07-09
24,872,166,348 tokens

2026-07-10
20,478,372,224 tokens

2026-07-13
18,809,717,879 tokens

2026-07-14
19,712,084,944 tokens

2026-07-15
20,941,405,313 tokens

2026-07-16
21,826,805,359 tokens

2026-07-17
17,762,368,773 tokens

2026-07-19
12,734,529,635 tokens

2026-07-20
18,885,371,868 tokens

Jul 6, 2026Oct 3, 2026

Daily observations · 11 days

Date (UTC)	Reported tokens	Reported routes
Jul 20, 2026	18,885,371,868	1
Jul 19, 2026	12,734,529,635	1
Jul 17, 2026	17,762,368,773	1
Jul 16, 2026	21,826,805,359	1
Jul 15, 2026	20,941,405,313	1
Jul 14, 2026	19,712,084,944	1
Jul 13, 2026	18,809,717,879	1
Jul 10, 2026	20,478,372,224	1
Jul 9, 2026	24,872,166,348	1
Jul 8, 2026	25,316,632,031	1
Jul 7, 2026	24,462,510,406	1

Source: OpenRouter (openrouter.ai/rankings), as of Oct 4, 2026. CC BY 4.0. Totals include only individually published routes. Tokenizers differ by provider; the aggregated “other” category is never assigned to a model.

Technical details & API

Explore specifications, supported parameters, reasoning controls, and API identifiers for each OpenRouter route.

Current route specifications

google/gemini-3.1-flash-lite-previewObserved Oct 4, 2026, 11:31 AM UTC

Context: 1,048,576
Maximum output: 65,536
Tokenizer: Gemini
Input: text, image, video, file, audio
Output: text
Moderation: No
Added to OpenRouter: 2026-03-03

Base URLhttps://openrouter.ai/api/v1

Model IDgoogle/gemini-3.1-flash-lite-preview

Version IDgoogle/gemini-3.1-flash-lite-preview-20260303

Reasoning

Required: No
Enabled by default: Yes
Default effort: minimal
Supported efforts: high, medium, low, minimal

Supported parameters

include_reasoning
max_tokens
reasoning
reasoning_effort
response_format
seed
structured_outputs
temperature
tool_choice
tools
top_p

Frequently asked questions

Answers based on the model metadata and serving offers currently in the catalog.

How much does Gemini 3.1 Flash Lite Preview cost?

Listed rates start at $0.125 per million input tokens and $0.75 per million output tokens. Prices vary by provider and configuration; see Pricing for details.

Which providers offer Gemini 3.1 Flash Lite Preview?

There are 11 cataloged offers across 9 providers. Compare model IDs, prices and limits in Providers.

What is the context window?

The cataloged model context is 1,048,576 tokens. Each serving endpoint may apply a different limit.

Does it support tools and structured output?

Tool calling: Yes. Structured output: Yes. Support can vary by endpoint.

Catalog history · 2 recorded revisions

Metadata observations since this model was first cataloged. These are not model release versions.

Sep 14, 2026 · c2854a9d827b
Sep 12, 2026 · 771b3bf85623