LLM Reference

Gemini 3.1 Flash Lite Preview

Released
2026-03-03
Last refreshed
2026-06-29
Status
Researched 32d ago
DeprecatedProprietaryCommercial use: conditionalMultimodalCodingRAGAgentsLong contextVisionClassificationJSON / Tool use

Gemini 3.1 Flash Lite Preview is a legacy integration reference; evaluate Gemini 3.1 Flash-Lite before starting new work.

Use it for

  • Teams maintaining an existing integration
  • Workloads that can use a 1m context window

Do not use it for

  • New production launches
  • Cost-sensitive launches that need sourced token pricing
Specifications
Released
2026-03-03
Context
1m
Architecture
Decoder Only
Knowledge cutoff
2025-01
Specialization
general
Openness
Proprietary
License
ProprietaryCommercial use: conditional
Training
Pretrained
Created by
Google DeepMindGoogle DeepMind

Pioneering artificial intelligence research.

London, United Kingdom
Founded 2014
Website
Pricing

No tracked provider token pricing is available yet.

Providers(4)
Google AI StudioGCP Vertex AIOpenRouterVercel AI Gateway
View 4 provider routes
Links
Website

This model is deprecated. Google DeepMind recommends switching to Gemini 3.1 Flash-Lite.

About

Preview-stage Gemini 3.1 Flash-Lite model shut down on 2026-05-25; use gemini-3.1-flash-lite GA instead.

Gemini 3.1 Flash Lite Preview is a proprietary model in the Gemini 3.1 family. The structured metadata tracks a 1m-token context window, multimodal input, function calling, tool use, structured outputs, and code execution. This page tracks provider routes through Google AI Studio, GCP Vertex AI, OpenRouter, and 1 more, with the cheapest tracked route listed at $0.25 input and $1.5 output per 1M tokens. Headline tracked benchmarks include MultiChallenge 60.6, Google-Proof Q&A 86.9, and Humanity's Last Exam 16.2.

Top use-case fit: coding, agents, and build tasks

Coding

1 relevant benchmark in the decision map.

RAG

Included by capability and metadata signals in the decision map.

Agents

1 relevant benchmark in the decision map.

Provider price ladder

Compare all 4

No tracked provider token pricing is available for this model yet.

Available via routers & gateways(13)

LiteLLM

Gateway

Open-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.

Free OSSGoogle AI StudioGCP Vertex AI

OpenRouter

Hybrid

Unified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.

PassthroughGoogle AI StudioGCP Vertex AI

Portkey

Gateway

Production AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.

SubscriptionGoogle AI StudioGCP Vertex AI

AIRouter

Router

Commercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.

Passthrough + feeGoogle AI StudioGCP Vertex AI

Helicone

Gateway

Observability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.

SubscriptionGoogle AI StudioGCP Vertex AI

Kong AI Gateway

Gateway

Multi-LLM AI gateway built on Kong Gateway 3.x, adding semantic routing, load balancing, guardrails, and MCP traffic analytics as plugins over Kong's existing API management platform.

SubscriptionGoogle AI StudioGCP Vertex AI

Capabilities

VisionMultimodalFunction CallingTool UseStructured OutputsCode Execution

Benchmark peer barsfor Coding

LiveCodeBenchRank 41 of 57
DeepSeek V4 Pro
93.5
Fugu Ultra
93.2
Fugu
92.9
Gemini 3.1 Pro Preview
91.7
Gemini 3.1 Flash Lite Previewcurrent
72.0

Benchmark scores(5)

Scores are benchmark-specific and are direction-aware: the same numeric gap can mean very different outcomes across suites. Use the leaderboard context and this model's provider route to decide whether the winning margin is meaningful for your workload.
BenchmarkScoreVersionSource
MultiChallenge60.6MultiChallengehttps://labs.scale.com/leaderboard/multichallenge
Google-Proof Q&A86.9GPQA Diamond (accuracy)https://www.buildfastwithai.com/blogs/gemini-3-1-flash-lite-vs-2-5-flash-speed-cost-benchmarks-2026
Humanity's Last Exam16.2HLE (accuracy)https://designforonline.com/ai-models/google-gemini-3-1-flash-lite-preview/
LiveCodeBench72.0LiveCodeBench accuracy (accuracy)https://www.buildfastwithai.com/blogs/gemini-3-1-flash-lite-vs-2-5-flash-speed-cost-benchmarks-2026
MMLU PRO83.0MMLU-Pro (accuracy)https://www.buildfastwithai.com/blogs/gemini-3-1-flash-lite-vs-2-5-flash-speed-cost-benchmarks-2026

Migration checks

No linked migration route is available for this model yet.

Compare Gemini 3.1 Flash Lite Preview with other models

Frequently asked questions

What is the context window of Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview has a context window of 1m tokens.

How much does Gemini 3.1 Flash Lite Preview cost?

Gemini 3.1 Flash Lite Preview is available at $0.25/1M input tokens through Google AI Studio.

When was Gemini 3.1 Flash Lite Preview released?

Gemini 3.1 Flash Lite Preview was released on 2026-03-03.

Which providers offer Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview is available from 4 providers: Google AI Studio, GCP Vertex AI, OpenRouter, Vercel AI Gateway.

What benchmarks has Gemini 3.1 Flash Lite Preview been tested on?

Gemini 3.1 Flash Lite Preview has been evaluated on 5 benchmarks, including MultiChallenge, Google-Proof Q&A, Humanity's Last Exam, LiveCodeBench, MMLU PRO.