Google: Gemini 2.5 Flash Preview 09-2025

google/gemini-2.5-flash-preview-09-2025

Created Sep 25, 20251,048,576 context

$0.30/M input tokens$2.50/M output tokens$1.238/K input imgs$1/M audio tokens

Gemini 2.5 Flash Preview September 2025 Checkpoint is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with greater accuracy and nuanced context handling.

Additionally, Gemini 2.5 Flash is configurable through the "max tokens for reasoning" parameter, as described in the documentation (https://openrouter.ai/docs/use-cases/reasoning-tokens#max-tokens-for-reasoning).

Providers for Gemini 2.5 Flash Preview 09-2025

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for Gemini 2.5 Flash Preview 09-2025

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Apps using Gemini 2.5 Flash Preview 09-2025

Top public apps this week using this model

Recent activity on Gemini 2.5 Flash Preview 09-2025

Total usage per day on OpenRouter

Uptime stats for Gemini 2.5 Flash Preview 09-2025

Uptime stats for Gemini 2.5 Flash Preview 09-2025 across all providers

Sample code and API for Gemini 2.5 Flash Preview 09-2025

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 400+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.