Google · in Borg

Gemini 3.1 Flash-Lite

Gemini 3.1 Flash-Lite brings the Lite tier into Google's third-generation Gemini family.

Reasoning1,048,576 tokenstext, image, video, audio, pdf

1,048,576 tokensContext window

1141 msMedian time to first token (gateway proxy)

112.9Output tokens per second (whole turn)

99.9%Request success

$0.25 / $1.5Vendor API price in / out · per 1M

Included in Borg

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At a glance

Specification	Value
Provider	Google
Family	Gemini
Release date	2026-03-03 Vendor source
Context window	1,048,576 tokens Vendor source
Input modalities	text, image, video, audio, pdf
Output modalities	text
Reasoning	Yes
Open weights	No
Borg lane ids	`antigravity/gemini-3.1-flash-lite`, `google/gemini-3.1-flash-lite`, `google/gemini-3.1-flash-lite-preview`
Versions in Borg	Gemini 2.5 Flash-Lite · Gemini 3.1 Flash-Lite · Gemini 3.5 Flash-Lite
Median time to first token (gateway proxy) on Borg	1141 ms
Median tokens per second (end to end) on Borg	112.9 output tokens per second

Not published by the vendor: thinking modes, knowledge cutoff, fusion roles.

What Gemini 3.1 Flash-Lite is good for

Gemini 3.1 Flash-Lite brings the Lite tier into Google's third-generation Gemini family. It is tuned for lower latency and token cost than the larger Flash and Pro siblings, while still accepting text, pictures, video, audio and PDFs in a large context window. Translation, message triage, straightforward extraction and high-volume subagent calls are better matches than deep debugging or intricate visual generation. It supports thinking and function calling, but its role is to process routine work at scale rather than spend many tokens deliberating. The current stable model followed an earlier preview under the same family name. Borg includes Flash-Lite in the subscription; Borg Fusion can route lighter requests to it, or you can select the lane yourself to keep a batch workflow consistent.

large-scale translation
support-ticket classification
lightweight subagent tool calls

How Borg uses it

Gemini 3.1 Flash-Lite is available as a subscription catalog lane in Borg. The catalog does not publish which Fusion profiles route to this model, so no routing role is claimed here. You can pick it directly by setting the OpenAI-compatible gateway model field to a listed lane id. Check the current catalog for availability before building a workflow around a lane.

model: "antigravity/gemini-3.1-flash-lite"

Measured on Borg

Metric	Median	95th percentile	Samples
Time to first token (gateway proxy)	1141 ms	2986 ms	66352
Tokens per second (end to end)	112.9 output tokens per second	240.1 output tokens per second	312043
Request success rate	99.9%	—	87911

Time to first token (gateway proxy)

Lower is fasterFleet median 3971.5 ms

Gemini 3.1 Flash-Lite1141 ms

Output tokens per second (whole turn)

Higher is fasterFleet median 31.9 tokens/s

Gemini 3.1 Flash-Lite112.9 tokens/s

Time to first token (gateway proxy): time until the first streamed response event reaches the gateway; our closest available measure of time to first token
Tokens per second (end to end): tokens per second, end to end: provider-reported output tokens divided by the whole turn's elapsed time, including queueing and reasoning; not a streaming per-token rate

Share of requests Borg completed successfully, excluding requests the client cancelled.

Completion speed covers the whole turn including queueing and reasoning time; it is not a streaming tokens-per-second figure.

Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 657134 requests. Minimum 100 samples per published request metric.

Benchmarks

Google-reported internal automated safety evaluations, relative to the comparator named below. These are changes in evaluation performance, not absolute capability scores or human red-team results. Google says updated evaluations are not directly comparable with results in earlier model cards. Vendor evaluation details

Benchmark	Vendor-reported score	Source
Text-to-text safety vs Gemini 2.5 Flash-Lite	-1.18%	Vendor source
Multilingual safety vs Gemini 2.5 Flash-Lite	-1.84%	Vendor source
Image-to-text safety vs Gemini 2.5 Flash-Lite	-21.7%	Vendor source

Pricing

Included in Borg subscription. Vendor API list price: $0.25 input / $1.5 output per 1M tokens. Vendor price source.

Input and cache rates shown are for text/image/video, not audio. Vendor pricing terms

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FAQ

What is Gemini 3.1 Flash-Lite?

Gemini 3.1 Flash-Lite is listed in Borg's subscription catalog as antigravity/gemini-3.1-flash-lite. Gemini 3.1 Flash-Lite brings the Lite tier into Google's third-generation Gemini family.

Is Gemini 3.1 Flash-Lite in Borg?

Yes. Gemini 3.1 Flash-Lite is listed in Borg's subscription catalog under the lane antigravity/gemini-3.1-flash-lite. You can choose the lane directly, or explore the available Fusion profiles. Availability and model details can change; check the current catalog before deployment.

What context window does Gemini 3.1 Flash-Lite have?

The published context window is 1,048,576 tokens. Consult the cited sources for details and current limits. Vendor source

Is Gemini 3.1 Flash-Lite good for coding?

Vendor-published evaluations appear in the benchmarks section; their settings may differ from your tasks. Its listed uses include large-scale translation, support-ticket classification, lightweight subagent tool calls. Try the lane for your own tasks, and compare the output with your requirements before choosing a default.

How fast is Gemini 3.1 Flash-Lite on Borg?