Gemini 3 Flash (preview) API — pricing, playground & code

Name: Gemini 3 Flash (preview) API
Brand: Google

Overview

About Gemini 3 Flash (preview)

The Gemini 3 Flash preview line. Every model on CompanyFabric shares the same API key, billing balance, and rate-limit envelope — one integration covers the entire library.

Facts

At a glance

Availability

Live

Pricing

Metered exactly per call

Context window

1,048.576k tokens

Commercial use

See license

Commercial output use permitted per Google terms.

Variants

All endpoints

Gemini 3.7 Flash

Google's current fast model, million-token context.

Chat Completions

Gemini 3.5 Flash

The previous stable Flash, still current for most work.

Chat Completions

Gemini 2.5 Pro

Google's stable Pro tier — the non-preview reasoning model.

Chat Completions

Gemini 2.5 Flash

Long-context workhorse on the stable 2.5 line.

Chat Completions

Gemini 3.1 Pro (preview)

Google's newest Pro tier, shipped as a preview.

Chat Completions

Gemini 3 Flash (preview)

The Gemini 3 Flash preview line.

Chat Completions

Quickstart

How to use the Gemini 3 Flash (preview) API

1
Create a free CompanyFabric account — starter credits are included, no card required.
2
Copy your API key from the dashboard. One key covers every model in the library.
3
Point any OpenAI SDK at api.companyfabric.com/v1 and set model to "google/gemini-3-flash-preview".
4
Read the exact metered cost of the call from the response — the same number shown in the playground.

Use cases

What teams build with it

Agents & copilots

Drive agent loops, tool calls, and user-facing assistants over the OpenAI-compatible endpoint.

agentstool useassistants

Content pipelines

Summarization, rewriting, and structured generation at metered per-token cost.

contentsummarization

Extraction & classification

Turn unstructured input into typed JSON with schema-constrained output.

extractionjson mode

Get better output

Prompting tips

State the output format before the task — models follow contracts declared early.
Few-shot beats description: two worked examples outperform a paragraph of rules.
Cap output length explicitly when cost matters; output tokens dominate most bills.

Exact, metered, prepaid

Gemini 3 Flash (preview) pricing

Gemini 3 Flash (preview) pricing is per token: $0 / M input · $0 / M output. Output tokens cost more than input tokens, so long generations — not long prompts — are what actually drive most bills. A typical call with a 2k-token prompt and a 1k-token answer costs about $0.0000.

Every call is metered exactly and attributed to your key — the dashboard, the API usage response, and your invoice all read from the same ledger row. Cap any key's monthly spend with a budget cap, and bring your own provider key (BYOK) at 0% platform fee if you already have a direct contract.

Endpoint	Type	Price
Gemini 3.7 Flash	Chat	$0 / M input · $0 / M output
Gemini 3.5 Flash	Chat	$0 / M input · $0 / M output
Gemini 2.5 Pro	Chat	$0 / M input · $0 / M output
Gemini 2.5 Flash	Chat	$0 / M input · $0 / M output
Gemini 3.1 Pro (preview)	Chat	$0 / M input · $0 / M output
Gemini 3 Flash (preview)	Chat	$0 / M input · $0 / M output

Starter credits

Use Gemini 3 Flash (preview) free

Your CompanyFabric starter credits cover your first Gemini 3 Flash (preview) calls at no cost — create a free account, no card required, and the credits apply to Gemini 3 Flash (preview) and every other model on the key. When they run out, prepaid credits or BYOK (0% fee) take over with no plan to pick.

All ways to use AI models free →

Production-grade

Code samples

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://api.companyfabric.com/v1",
  apiKey: process.env.COMPANYFABRIC_API_KEY,
})

const res = await client.chat.completions.create({
  model: "google/gemini-3-flash-preview",
  max_tokens: 1024,
  temperature: 0.7,
  messages: [{ role: "user", content: "Say hello from the fabric." }],
})

console.log(res.choices[0].message.content)

Playground

Try it in the browser

Playground

Model

Prompt

Comparisons

Gemini 3 Flash (preview) vs the alternatives

Gemini 3 Flash (preview) vs Claude Haiku 4.5

Gemini 3 Flash (preview) and Claude Haiku 4.5 compete for the same text workloads. Both run behind the same CompanyFabric key at exact metered prices — A/B them on your real prompts and let the outputs decide, then switch with a one-line change.

FAQ

Frequently asked questions

How much does the Gemini 3 Flash (preview) API cost?

$0 / M input · $0 / M output. Every call is metered exactly and shown before you run it.

How do I get a Gemini 3 Flash (preview) API key?

Create a CompanyFabric account, and one key unlocks Gemini 3 Flash (preview) and every other model in the library. Free starter credits are included — no subscription, no card required to try it.

Why use Gemini 3 Flash (preview) on CompanyFabric instead of going direct?

One key, one prepaid balance, and one rate-limit envelope across the whole library, at pricing at parity with or below the direct API. Model switching is a one-line change, and BYOK routing is 0% fee.

Is the API OpenAI-compatible?

Yes — point any OpenAI SDK at api.companyfabric.com/v1 and set model to "google/gemini-3-flash-preview".

Can I use the output commercially?

Commercial output use permitted per Google terms.

How does billing work?

Prepaid credits via card, or BYOK with your own provider keys at 0% platform fee. No subscription required; balances never expire.

Provider