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Favicon for google

Google: Gemini 3 Flash Preview

google/gemini-3-flash-preview

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Gemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance. It delivers near Pro level reasoning and tool use performance with substantially lower latency than larger Gemini variants, making it well suited for interactive development, long running agent loops, and collaborative coding tasks. Compared to Gemini 2.5 Flash, it provides broad quality improvements across reasoning, multimodal understanding, and reliability.

The model supports a 1M token context window and multimodal inputs including text, images, audio, video, and PDFs, with text output. It includes configurable reasoning via thinking levels (minimal, low, medium, high), structured output, tool use, and automatic context caching. Gemini 3 Flash Preview is optimized for users who want strong reasoning and agentic behavior without the cost or latency of full scale frontier models.

Modalities
In / Out Price
$0.50 / $3per 1M
Context
1.0M
Released
Dec 17, 2025
Compare
ProvidersPricingPerformanceUptimeAppsActivityFAQExplore

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

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.

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.

API

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.

Google: Gemini Flash versions

Not currently available through EU in-region routing. In-region routing docs

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$0.50$3.00$0.050$0.101.09s84 tps
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Not used in Standard routing:Why these endpoints are not used
Flex
$0.25$1.50$0.025$0.051.54s106 tps
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$0.90$5.40$0.090$0.181.13s95 tps
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Priority
$0.90$5.40$0.090$0.181.32s158 tps
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Flex
$0.25$1.50$0.025$0.0513.25s23 tps
63.94%
Throughput
158tok/s

P50, best across providers

Latency
1.09s

P50, best provider

AutoExacto benchmarks
GPQA DiamondTAU-BenchGoogle Vertex91.6%74.0%Google AI Studio90.2%70.0%auto-routing88.6%71.3%
Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.94%

Availability over the last 3 days

Last 72 hours
Availability 99.94%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.95%
Without Routing
99.07%

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 provider routing options.

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Frequently asked questions

Gemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance. It delivers near Pro level reasoning and tool use performance with substantially lower latency than larger Gemini variants, making it well suited for interactive development, long running agent loops, and collaborative coding tasks.

Gemini 3 Flash Preview costs $0.50/M input tokens and $3.00/M output tokens, with separate rates for Cache Read at $0.05/M tokens, Cache Write at $0.08333/M tokens, Image Input at $0.50/M tokens, Input Audio at $1.00/M tokens, Input Audio Cache at $0.10/M tokens, and Web Search at $14.00/1K calls.

Gemini 3 Flash Preview has a 1,048,576 token context window. It supports up to 65,536 completion tokens.

Yes. Gemini 3 Flash Preview accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

Gemini 3 Flash Preview accepts text, images, files such as PDFs, audio, and video as input and returns text.

Gemini 3 Flash Preview is served by 2 providers on OpenRouter: Google Vertex and Google AI Studio. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

Gemini 3 Flash Preview was released on December 17, 2025.