Evalry

Gemini 2.5 Flash Preview 09-2025

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).

by Google

Overview

Quick stats across all benchmark runs.

Score

—

11 benchmarks

Avg Latency

7.4s

15 requests

Pricing

$0.30 in / $2.50 out

per 1M tokens

Context

1049K

tokens

Alternatives

Models with similar or better quality but different tradeoffs

No alternatives found

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Benchmark Performance

How this model performs across different benchmarks

No benchmark data available

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Price vs Performance

Compare cost efficiency across all models

Current model (baseline)
Other models (relative score)
Y-axis shows score difference from shared benchmarks. X-axis uses log scale.

Score Over Time

Performance trends across all benchmark runs

Benchmark Activity

Number of benchmark runs over time

Quickstart

View on OpenRouter

Get started with this model using OpenRouter

import { OpenRouter } from "@openrouter/sdk";

const openrouter = new OpenRouter({
  apiKey: "<OPENROUTER_API_KEY>"
});

const completion = await openrouter.chat.completions.create({
  model: "google/gemini-2.5-flash-preview-09-2025",
  messages: [
    {
      role: "user",
      content: "Hello!"
    }
  ]
});

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

Get your API key at openrouter.ai/keys

Other Models from Google

Compare performance with other models from the same creator

ModelLatencyCost/1MScore
Gemini 2.5 Pro22.2s$5.6385%
Gemini 3.1 Pro Preview9.1s$7.0079%
Gemini 3 Flash Preview5.7s$1.7577%
Gemini 3.1 Flash Lite1.8s$0.8865%
Gemini 2.5 Flash8.4s$1.4057%
Gemini 2.0 Flash7.0s$0.2546%
Gemini 2.5 Flash Lite5.9s$0.2523%
Gemini 2.5 Flash Image Preview (Nano Banana)—$1.40—
Nano Banana Pro (Gemini 3 Pro Image Preview)37.7s$7.00—
Gemini 2.5 Pro Preview 05-0639.7s$5.63—
Gemini 2.0 Flash Lite8.8s$0.19—
Gemma 2 27B13.2s$0.65—
Gemma 4 26B A4B —Free—
Gemma 4 31B—Free—
Lyria 3 Pro Preview—Free—
Lyria 3 Clip Preview—Free—
Gemma 3 27B21.3s$0.12—
Gemini 3.1 Flash Lite Preview—$0.88—
Nano Banana 2 (Gemini 3.1 Flash Image Preview)—$1.75—
Gemini 3.1 Pro Preview Custom Tools—$7.00—
Gemma 3 4B27.8s$0.06—
Gemma 3 12B28.6s$0.09—
Gemma 3n 4B23.5s$0.09—
Gemini 2.5 Pro Preview 06-0534.8s$5.63—
Gemini 2.5 Flash Lite Preview 09-20255.0s$0.25—
Nano Banana (Gemini 2.5 Flash Image)50.1s$1.40—
Gemini 3 Pro Preview20.8s$7.00—
Gemma 2 9B6.1s$0.06—
Gemini 3.5 Flash2.1s$5.25—
Gemma 3n 2B (free)30.6sFree—
Gemini 2.0 Flash Experimental (free)13.3sFree—