English
chat.gemini_2_5_flash_lite
google/gemini-2-5-flash-lite
chat

The Gemini 2.5 Flash Lite API is Google's fastest and most cost-efficient Gemini 2.5 model — a 1M-token context window, native input for text, images, audio, video, and PDF, function calling, and structured JSON outputs, tuned for low latency and high throughput. The Gemini 2.5 Flash Lite API is OpenAI-compatible: point any existing SDK at RouterBase and set the model to gemini-2-5-flash-lite. Input at $0.095 / 1M tokens, output at $0.34 / 1M tokens, cache reads at $0.0095 / 1M tokens — 5% below the official published rate, all through one REST endpoint.

Input
Gemini 2.5 Flash-Lite
max_tokens4096
temperature1
top_p1
presence_penalty0
frequency_penalty0
Gemini 2.5 Flash-Lite Online
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Gemini 2.5 Flash Lite API: Chat

Use the Gemini 2.5 Flash Lite API to run Google's fastest, most cost-efficient Gemini 2.5 model with a 1M-token context window and multimodal input.

The Gemini 2.5 Flash Lite API is Google's smallest and most cost-efficient Gemini 2.5 model — a 1M-token context window, native input for text, images, audio, video, and PDF, function calling, and structured JSON outputs, tuned for the lowest latency and highest throughput at scale. Routed through RouterBase, the Gemini 2.5 Flash Lite API is fully OpenAI-compatible: point any existing SDK at RouterBase's base URL, set the model to gemini-2-5-flash-lite, and your first call goes through immediately.

Pricing is $0.095 / 1M input tokens, $0.34 / 1M output tokens, and $0.0095 / 1M cached-input reads — 5% below the official published rate. One RouterBase key — no Google credentials required.

Why this model

Six reasons teams ship on the Gemini 2.5 Flash Lite API

From a 1M-token context to 5%-off pricing — what makes the Gemini 2.5 Flash Lite API stand out.

1M-token context

Accepts up to 1 million tokens per request — long documents, multi-file code, or video transcripts fit in a single Gemini 2.5 Flash Lite API call without chunking.

Fastest, cheapest 2.5 tier

Built for high-volume workloads: the Gemini 2.5 Flash Lite API is the lowest-cost Gemini 2.5 model at $0.095 / 1M input tokens — ideal for classification, summarization, extraction, and routing at scale.

Native multimodal input

The Gemini 2.5 Flash Lite API understands text, images, audio, video, and PDFs. Pass mixed media in one request to analyze, transcribe, or reason across modalities.

Function calling & JSON

Define tools and request a JSON schema; the Gemini 2.5 Flash Lite API returns structured tool calls and strictly valid JSON for reliable agent and extraction pipelines.

OpenAI-compatible endpoint

The Gemini 2.5 Flash Lite API speaks the OpenAI chat-completions wire format. Point any OpenAI SDK at RouterBase — no Google SDK or separate credentials needed.

One key for 200+ models

The same RouterBase key that calls the Gemini 2.5 Flash Lite API also routes to GPT-5, Claude Opus 4.8, Gemini 2.5 Pro, and 200+ other models — no per-provider credential management.

RouterBase dashboard preview
Quickstart

Get started with the Gemini 2.5 Flash Lite API in 3 steps

From sign-up to your first response in under 5 minutes.

  1. Create a RouterBase API key

    Sign up and generate an API key — one key reaches the Gemini 2.5 Flash Lite API and every other model in the catalog.

  2. Send your first message

    Point any OpenAI-compatible SDK at routerbase.com/v1 and set the model to gemini-2-5-flash-lite. The response follows the standard chat-completions schema — streaming and multimodal input supported.

  3. Inspect usage

    Every response includes a detailed token breakdown — input, output, and cache-read tokens — so cost and cache-hit rate are visible on every call.

Get API Key Read docs
Pricing

Pay only for what you use

RouterBase passes through partner-tier pricing. Compared against the model's official published API rate.

Customer stories

What teams build with the Gemini 2.5 Flash Lite API

Real production loads running on the Gemini 2.5 Flash Lite API and the RouterBase model catalog.

Marcus Reyes
Marcus ReyesCTO, Paradigm AI

We route 90% of our traffic through the Gemini 2.5 Flash Lite API — classification and extraction at a fraction of the cost. The 5% RouterBase discount is pure margin.

Priya Lakshmi
Priya LakshmiFounder, Quillo

Native multimodal on the Gemini 2.5 Flash Lite API reads images and audio directly — one fast, cheap call captions and transcribes together.

Thomas Beck
Thomas BeckStaff Engineer, Northbeam

Structured JSON outputs from the Gemini 2.5 Flash Lite API killed our flaky regex parsing. Strictly valid JSON every time, zero retries.

Aoi Tanaka
Aoi TanakaML Lead, Daybreak Robotics

At our volume, Flash-Lite is the only Gemini 2.5 model that pencils out. RouterBase makes it 5% cheaper still.

Jonas Keller
Jonas KellerIndie Developer

The Gemini 2.5 Flash Lite API handles my high-volume summarization loop. Cheap enough that I stopped counting tokens.

Ethan Nguyen
Ethan NguyenHead of Engineering, Compound Studio

RouterBase puts the Gemini 2.5 Flash Lite API and 200+ other models behind one key. Our team stopped filing requests for new provider accounts.

Sophia Martín
Sophia MartínCTO, Relay

We A/B the Gemini 2.5 Flash Lite API against Gemini 2.5 Pro per request — same SDK, one model field. Most traffic stays on Flash-Lite and the bill dropped 70%.

Lucas Fernandes
Lucas FernandesEngineering Manager, Light

We migrated 42 services to the Gemini 2.5 Flash Lite API over a weekend. The only PR comment was 'wait, that's all?'.

David Okonkwo
David OkonkwoCo-founder, Figment

At $0.095 / 1M input minus 5%, the Gemini 2.5 Flash Lite API made our high-volume features actually profitable. The ROI math was instant.

Frequently Asked Questions

Common questions about the Gemini 2.5 Flash Lite API.

It is RouterBase's pass-through to Google's Gemini 2.5 Flash-Lite — the fastest, cheapest Gemini 2.5 chat endpoint with a 1M-token context, native vision/audio/video input, function calling, and structured outputs, served via an OpenAI-compatible REST interface.