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OpenRouter

Gemini 2.5 Flash Lite Preview 09-25 API

OpenRouter
About

Build advanced reasoning agents with Gemini 2.5 Flash Lite Preview 09-25, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.10/1M input and $0.40/1M output tokens, native tool calling support. Access Gemini 2.5 Flash Lite Preview 09-25 via the OpenRouter API with up to 66K output tokens.

Capabilities

Input Modalities

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Output Modalities

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Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
66K

Tokens

Pricing

Standard (per 1M tokens)

Input
$0.10
Output
$0.40

Caching (per 1M tokens)

Read
$0.03
Frequently Asked Questions

Gemini 2.5 Flash Lite Preview 09-25 by OpenRouter costs $0.10 per 1M input tokens and $0.40 per 1M output tokens. Cached reads cost $0.03 per 1M tokens.

Model Details
ID
google/gemini-2.5-flash-lite-preview-09-2025
Provider
OpenRouter
Family
gemini-flash-lite
Release Date
Sep 25, 2025
Knowledge Cutoff
Jan 1, 2025
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1
Documentation