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Google DeepMindGemini 3 familyDeprecatedLanguage modelReleased 7 May 2026

Gemini 3.1 Flash-Lite

Budget Gemini 3.1 model; migrate to gemini-3.5-flash-lite before May 2027.

Model idgemini-3.1-flash-lite

Price$0.25 in, $1.50 out per 1M tokens

Checked29 September 2026

No published training cutoff

At least1,854events since its release on 7 May 2026

83 historic, 424 major. 190 days of news.

Google DeepMind doesn’t publish a training cutoff, so we count from its release date. The real gap is larger.

How to call it

2 ways to use Gemini 3.1 Flash-Lite, with the model id each provider expects.

Providers, model ids, endpoints and docs for Gemini 3.1 Flash-Lite
ProviderModel idEndpointDocs
Gemini API gemini-3.1-flash-lite https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-lite:generateContent ai.google.dev
OpenRouter google/gemini-3.1-flash-lite

Pricing

Prices for Gemini 3.1 Flash-Lite
Input$0.25 per 1M tokens
Output$1.50 per 1M tokens

As published: “per 1M tokens (Standard; text/image/video input; audio input $0.50)”.

Source: ai.google.dev, checked 29 September 2026.

Specs

Input
Text, images, audio, video and PDF
Output
Text
Context window
1,048,576 tokens
Max output
65,536 tokens
Open weights
No
Licence
Proprietary
Training cutoff
Not published
Released
7 May 2026
Status
Deprecated
Type
Language model

What stands out

What its maker marketed at launch, and what people found later, each with its source.

  • Low-cost frontier-class Lite

    Described as frontier-class performance at reduced cost; cheapest per-token 3.x text model.

    Source: ai.google.dev

  • Full tool stack on a Lite model

    1M-token multimodal input (text, image, video, audio, PDF) with 65K output.

    Source: ai.google.dev

Notes

Stable GA 2026-05-07; scheduled shutdown 2027-05-07, replacement gemini-3.5-flash-lite. Preview id gemini-3.1-flash-lite-preview (early 2026) still listed by the live API / OpenRouter though docs list it as shut down.

curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-lite:generateContent" \
  -H "x-goog-api-key: $GEMINI_API_KEY" -H "Content-Type: application/json" \
  -d '{"contents":[{"parts":[{"text":"Hello"}]}]}'

Sources: model page, pricing, deprecations.