AI Model Release Tracker

Gemini 2.5 Flash

Released

Gemini 2.5 Flash is an AI model released by Google on Thursday, Apr 17 2025, 23 days after Gemini 2.5 Pro. It has a 1M token context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.. Benchmark results (shown below) cover BullshitBench v2.

API pricing

InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
$0.30
Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
$0.03
OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
$2.50
  • Output prices include reasoning tokens.
USD per 1M tokensEvery price here is for one million tokens. A token is roughly three-quarters of a word, so a million tokens is about 750,000 words of text.Verified August 18, 2026Read from ai.google.dev. Click the check to open the source.

Available from

Google AI Studio—flex$0.15$1.251M
Google AI Studio——$0.30$2.501M
Google——$0.30$2.501M
Googleeu—$0.30$2.501M
Googleglobal—$0.30$2.501M
Google AI Studio—priority$0.54$4.501M
Googleglobalpriority$0.54$4.501M
USD per 1M tokensEvery price here is for one million tokens. A token is roughly three-quarters of a word, so a million tokens is about 750,000 words of text.Checked October 19, 2026Third-party rates from openrouter.ai, not the lab’s own list price.

Benchmarks

BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better.
19%
#74 of 97

Compare Gemini 2.5 Flash with

Gemini 2.5 Flash

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About

Gemini 2.5 Flash, released April 17, 2025, brought hybrid reasoning to Google's high-volume tier: developers could turn thinking on or off and set an exact token budget for it, trading accuracy against latency and cost per request. It was the first model to expose that dial explicitly, and the design was widely copied.

Positioned as the workhorse of the 2.5 generation, Flash delivered a large share of 2.5 Pro's capability at a fraction of the price, making it one of the most heavily used API models of 2025 for chat products, summarisation, and agent sub-tasks. Flash-Lite followed in June 2025 to cover the ultra-low-cost end of the lineup.

Frequently asked questions

Gemini 2.5 Flash was released by Google on Thursday, Apr 17 2025.

All Google releases

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