gemini-3.1-pro-preview

deprecated

Context

1.0M

Max output

66K

Input price

$2/1M tokens

Output price

$12/1M tokens

Capabilities

vision

tool call

structured output

reasoning

json mode

streaming

fine tuning

batch

Details

ProviderGoogle Vertex AI

CreatorGoogle AI

Familygemini-3.1

Statusdeprecated

Input modalitiestext, image, video, audio

Output modalitiestext, image, audio

Knowledge cutoff2025-01

Release date—

Deprecation date2026-02-19

Type—

Reasoning tokens—

Max input—

Sourceofficial

Last updated2026-03-22

Tools

Function Callingfunction_calling

Call external functions and APIs

Endpoints

Generate ContentPOST

Generate text from multimodal inputhttps://us-central1-aiplatform.googleapis.com/v1beta/models/{model}:generateContent

Stream ContentPOST

Stream text generation responseshttps://us-central1-aiplatform.googleapis.com/v1beta/models/{model}:streamGenerateContent

Pricing

Text tokensPer 1M tokens

	Input	Cached input	Output
Standard	$2	—	$12
Priority	$3.6	—	$21.6
Flex	$1	—	$6

Family Comparison: gemini-3.1

Model	Perf	Speed	Context	Max out	Input	Output
gemini-3.1-flash-lite-previewRVTS	—	—	1.0M	66K	$0.25	$1.5
gemini-3.1-flash-image-previewRVTS	—	—	131K	33K	$0.5	$3
gemini-3.1-pro-previewRVTS	—	—	1.0M	66K	$2	$12

API

GET/v1/models/vertex/gemini-3.1-pro-preview

gemini-3.1-pro-preview

deprecated

Changes · 4 entries

gemini-3.1-pro-previewupdate7a4f1f6Mar 22, 2026, 05:43 AM

modalitiesoutput["text","image"]→["text","image","audio"]

pricinginput$2output$12batch input$1batch output$6tiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...

gemini-3.1-pro-previewupdateb50649fMar 21, 2026, 11:58 PM

tools["function_calling"]

endpoints["generateContent","streamGenerateContent"]

gemini-3.1-pro-previewupdatec9a70c5Mar 21, 2026, 08:12 AM

deprecation_dateFebruary 19, 2026→2026-02-19

knowledge_cutoffJanuary 2025→2025-01

gemini-3.1-pro-previewcreate7f5c66fMar 21, 2026, 05:16 AM