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Gemini 2.5 Flash Preview 09-2025

Gemini 2.5 Flash Preview 09-2025 is Google's September 2025 preview of the next Gemini 2.5 Flash, scoring 54% on SWE-Bench Verified (up from 48.9%), improving agentic tool use, and reducing thinking-mode output tokens compared to the stable release.

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Use with AI GatewayView docs
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'google/gemini-2.5-flash-preview-09-2025',
  prompt: 'Why is the sky blue?'
})
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09/25/2025