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- Apr 17, 202590% CONFIDENCEfrom the source
Gemini 2.5 Flash Released
- Google launched Gemini 2.5 Flash in preview on 17 April 2025, building on 2.0 Flash with "a major upgrade in reasoning capabilities, while still prioritizing speed and cost"[1]
- It is Google's first fully hybrid reasoning model: developers can turn thinking on or off and set a thinking budget to trade quality against cost and latency[1]
- On 17 June 2025 Google made 2.5 Flash and 2.5 Pro generally available and introduced 2.5 Flash-Lite[3]
Notable features
- Thinking budget from 0 to 24,576 tokens, settable by API parameter or a slider in Google AI Studio and Vertex AI; the model decides how much to think from the prompt's complexity[1]
- Keeps 2.0 Flash's speed and cost profile while improving performance on multi-step reasoning tasks[1]
- Available in preview through the Gemini API in Google AI Studio and Vertex AI[1]
References 383% CONFIDENCEOverall confidence: 83%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%developers.googleblog.com/en/start-building-with-gemini-25-flashdevelopers.googleblog.com· Posted Sep 30, 2026· Starts Apr 17, 2025 ✓· 46% of score
The Google Developers Blog[3] post "Start building with Gemini 2.5 Flash" is dated 17 April 2025 and says the preview is available that day in the Gemini API via Google AI Studio and Vertex AI.
- [2]75%Gemini (language model) - Wikipediaen.wikipedia.org· Added Sep 30, 2026· 46% of score
The Wikipedia article lists Gemini 2.5 Flash as released on 17 April 2025.
- [3]85%We're expanding our Gemini 2.5 family of modelsblog.google· Published Jun 17, 2025· 8% of score
Google's 17 June 2025 post made 2.5 Flash and Pro generally available and added 2.5 Flash-Lite.[1]
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