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Gemini 3 Flash Preview

GoogleReleased Dec 17, 2025

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...

Try in playground
Context window
1.0M tokens
Max output
66K tokens
Input
text, image, file, audio, video
Output
text
Tokenizer
Gemini
Released
Dec 17, 2025
Reasoning
optional

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.500$0.015$0.515
Output$3.00$0.090$3.09
Cache read$0.050$0.0015$0.052
Cache write$0.083$0.0025$0.086

Benchmarks

Design Arena

CategoryEloWin rateRank
agenticslidesagents107339.3%#9
agenticslides(python-pptx)agents107539.3%#9
androidnativeagents106247.9%#24
Full-stackagents113047.1%#17
godotgamedevagents121852.3%#8
Mobile appsagents118849.8%#17
Web appsagents118549.5%#17
3Dmodels126162.7%#29
Codemodels123957.6%#33
Game devmodels123258.3%#38
Websitesmodels123957%#33

Head-to-head preference voting. How we filter and rank

Supported parameters

  • include_reasoning
  • max_tokens
  • reasoning
  • response_format
  • seed
  • stop
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model google/gemini-3-flash-preview.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3-flash-preview",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="google/gemini-3-flash-preview",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "google/gemini-3-flash-preview",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does Gemini 3 Flash Preview cost via API?
Through OpenKey, Gemini 3 Flash Preview costs $0.515 per 1M input tokens and $3.09 per 1M output tokens. That is the provider price ($0.500 / $3.00) plus a flat 3% fee — nothing else.
What is Gemini 3 Flash Preview's context window?
Gemini 3 Flash Preview accepts up to 1.0M tokens of context and returns up to 66K tokens per request.
Is Gemini 3 Flash Preview OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "google/gemini-3-flash-preview" using any OpenAI SDK — only the base URL and API key change.
What inputs does Gemini 3 Flash Preview support?
Gemini 3 Flash Preview accepts text, image, file, audio, video input and produces text output.

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