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...
- 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 tokens | Provider | + 3% fee | You 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
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| agenticslidesagents | 1073 | 39.3% | #9 |
| agenticslides(python-pptx)agents | 1075 | 39.3% | #9 |
| androidnativeagents | 1062 | 47.9% | #24 |
| Full-stackagents | 1130 | 47.1% | #17 |
| godotgamedevagents | 1218 | 52.3% | #8 |
| Mobile appsagents | 1188 | 49.8% | #17 |
| Web appsagents | 1185 | 49.5% | #17 |
| 3Dmodels | 1261 | 62.7% | #29 |
| Codemodels | 1239 | 57.6% | #33 |
| Game devmodels | 1232 | 58.3% | #38 |
| Websitesmodels | 1239 | 57% | #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.
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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