Gemini 2.5 Flash Native Audio Preview 09-2025

by Google

Gemini 2.5 Flash Native Audio Preview (09-2025) is an earlier preview release of Google's native audio model, preceding the stable version. It offers real-time voice conversation with natively processed raw audio and a 131K-token context. This preview variant supports text, vision, tools, structured output, and thinking, making it suitable for testing real-time dialogue systems, voice agents, and multimodal assistants before moving to the stable release. Use the latest stable native audio model for production unless you have specific compatibility or feature-testing needs tied to the September 2025 timeframe.

Key info

Input
Output
Features
Context window
131K
Max output
8K
Input price
$0.75 /1M
Output price
$4.50 /1M
  • US residency available
  • Zero data retention via Enterprise
  • No training by default
  • GDPR DPA available

Available routes

Gemini 2.5 Flash Native Audio Preview 09-2025 runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance β€” full data-handling detail per route below.

ProviderRegionZero data retentionTrainingInputOutput
USEnterpriseNo$0.75$4.50

Training posture across routes: No training on prompts by default.

Data handling per route

Each route hosting Gemini 2.5 Flash Native Audio Preview 09-2025 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Gemini β€” United StatesπŸ‡ΊπŸ‡Έ

Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.

Zero data retention
Available via Opper Enterprise contract.
Training
No training on customer data.
Logging
Abuse monitoring
Third-party access
None disclosed
GDPR DPA
DPA available
Transfer mechanism
SCCs

Get started

Call Gemini 2.5 Flash Native Audio Preview 09-2025 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β€” Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into your coding agent β€” Claude Code, Cursor, Codex, and more β€” and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.click/v3/compat",
});
const completion = await client.chat.completions.create({
model: "gemini/gemini-2.5-flash-native-audio-preview-09-2025",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

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Gemini 2.5 Flash Native Audio Preview 09-2025 by Google β€” pricing, benchmarks | Opper AI