Gemini 2.5 Flash-Lite Preview 09-2025

GoogleMCP Tool CallReasoning

google/gemini-2.5-flash-lite-preview-09-2025Closed API

September 2025 preview of Gemini 2.5 Flash-Lite with better instruction following and multimodal quality

Benchmark Pricing$0.10 / 1M in$0.40 / 1M out$0.01 cache read

Context: 1,048,576 tokens•Max Output: 65,536 tokens•Knowledge: 2025-01•Released: 2025-09-25

TECHNICAL SPECIFICATIONS

Context Window1,048,5761M tokens

Max Output65,53665.5K tokens

LicenseProprietaryCloud API only

Input Modalities

TextVisionPDFAudioVideo

Function / Tool CallingSupported (MCP Ready)

Structured OutputsGuaranteed Schema

MODEL CONTEXT PROTOCOL (MCP) READINESS

✓ Gemini 2.5 Flash-Lite Preview 09-2025 natively supports OpenAI / Anthropic format tool calling and is fully compatible with MCP servers and agent loops.

MCP Context Window Recommendations

With a context capacity of 1,048,576 tokens, this model can handle extremely large MCP resource manifests, complete database schemas, and multiple active server tool definitions simultaneously without degradation.

API CALL INVOCATION EXAMPLE

// Example: Calling Gemini 2.5 Flash-Lite Preview 09-2025 via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.GOOGLE_API_KEY,
});

const response = await client.chat.completions.create({
  model: "google/gemini-2.5-flash-lite-preview-09-2025",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);