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Google: Gemini 3.1 Flash Lite Preview

google/gemini-3.1-flash-lite-preview

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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.

Modalities

In / Out Price

$0.25 / $1.50per 1M

Context

1M

Released

Mar 3, 2026

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ProvidersPricingPerformanceUptimeBenchmarksAppsActivityFAQ

Providers

This model is hosted by one provider. OpenRouter forwards every request to it directly — no routing decisions to make.

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Benchmarks

Scores on standardized evaluations. Higher percentages are better — and rank percentile shows where this model lands among all models on OpenRouter.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

Quick Start

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

About Google: Gemini 3.1 Flash Lite Preview

OpenRouter makes Google: Gemini 3.1 Flash Lite Preview available through a unified, OpenAI-compatible API using the model ID google/gemini-3.1-flash-lite-preview. It is served by Google AI Studio.

Google: Gemini 3.1 Flash Lite Preview accepts text, images, video, files such as PDFs and audio and returns text. It has a 1,048,576-token context window and a maximum output of 65,536 tokens.

On OpenRouter, Google: Gemini 3.1 Flash Lite Preview costs $0.25/M input tokens and $1.50/M output tokens, with separate rates for Cache Read at $0.025/M tokens, Cache Write at $0.08333/M tokens, Image Input at $0.25/M tokens, Input Audio at $0.50/M tokens, Input Audio Cache at $0.05/M tokens and Web Search at $14.00/1K calls. Effective pricing can be lower when prompt caching applies. It was released on March 3, 2026.

More models from Google

  • Gemini 3.7 Flash
  • Gemini 3.6 Flash
  • Gemini 3.5 Flash Lite

Frequently asked questions

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.

Gemini 3.1 Flash Lite Preview costs $0.25/M input tokens and $1.50/M output tokens, with separate rates for Cache Read at $0.025/M tokens, Cache Write at $0.08333/M tokens, Image Input at $0.25/M tokens, Input Audio at $0.50/M tokens, Input Audio Cache at $0.05/M tokens and Web Search at $14.00/1K calls.

Gemini 3.1 Flash Lite Preview has a 1,048,576 token context window. It supports up to 65,536 completion tokens.

Yes. Gemini 3.1 Flash Lite Preview accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Gemini 3.1 Flash Lite Preview accepts text, images, video, files such as PDFs and audio as input and returns text.

Gemini 3.7 Flash, Gemini 3.6 Flash, Gemini 3.5 Flash Lite and 25 more are other text models from Google.

Gemini 3.1 Flash Lite Preview was released on March 3, 2026.

$0.25$1.50$0.025$0.050.65s80 tps
98.60%

Throughput

80tok/s

P50, best across providers

Latency

0.65s

P50, best provider

Uptime (3d)

100.00%

Availability (3d)

99.83%

Availability over the last 3 days

Last 72 hours
Availability 99.83%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.64%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.

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