Starting April 29, 2025, Gemini 1.5 Pro and Gemini 1.5 Flash models are not available in projects that have no prior usage of these models, including new projects. For details, see Model versions and lifecycle.

Gemini 2.5 Flash
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2.5 Flash

Gemini 2.5 Flash is our best model in terms of price and performance, and offers well-rounded capabilities. Gemini 2.5 Flash is our first Flash model model that features thinking capabilities, which lets you see the thinking process that the model goes through when generating its response.

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Note: To use the "Deploy example app" feature, you need a Google Cloud project with billing and Vertex AI API enabled.

Technical specifications
Model ID	`gemini-2.5-flash-preview-05-20`
Supported inputs & outputs	Inputs: Text, Code, Images, Audio, Video Outputs: Text
Token limits	Maximum input tokens: 1,048,576 Maximum output tokens: 65,535
Capabilities	Supported Grounding with Google Search Code execution System instructions Controlled generation Function calling Count Tokens Thinking Preview feature Context caching Vertex AI RAG Engine Chat completions Not supported Tuning Batch prediction Live API Preview feature
Usage types	Supported Dynamic shared quota Not supported Fixed quota Provisioned Throughput
	Images	Maximum images per prompt: 3,000 Maximum image size: 7 MB Supported MIME types: `image/png`, `image/jpeg`, `image/webp`
	Documents	Maximum number of files per prompt: 3,000 Maximum number of pages per file: 1,000 Maximum file size per file for the API or Cloud Storage imports: 50 MB Maximum file size per file for direct uploads through the console: 7 MB Supported MIME types: `application/pdf`, `text/plain`
	Video	Maximum video length (with audio): Approximately 45 minutes Maximum video length (without audio): Approximately 1 hour Maximum number of videos per prompt: 10 Supported MIME types: `video/x-flv`, `video/quicktime`, `video/mpeg`, `video/mpegs`, `video/mpg`, `video/mp4`, `video/webm`, `video/wmv`, `video/3gpp`
	Audio	Maximum audio length per prompt: Appropximately 8.4 hours, or up to 1 million tokens Maximum number of audio files per prompt: 1 Speech understanding for: Audio summarization, transcription, and translation Supported MIME types: `audio/x-aac`, `audio/flac`, `audio/mp3`, `audio/m4a`, `audio/mpeg`, `audio/mpga`, `audio/mp4`, `audio/opus`, `audio/pcm`, `audio/wav`, `audio/webm`
	Parameter defaults	Temperature: 0-2 topP: 0.95 topK: 64 (fixed) candidateCount: 1-8
Knowledge cutoff date	January 2025
Versions	`gemini-2.5-flash-preview-05-20` Launch stage: Public preview Release date: May 20, 2025 `gemini-2.5-flash-preview-04-17` Launch stage: Public preview Release date: April 17, 2025
Supported regions
	Model availability	Global global United States us-central1
	See Data residency for more information.
Security controls
Security controls	See Security controls for more information.
Pricing	See Pricing.

Live API native audio

Gemini 2.5 Flash with Live API native audio is a preview model that features our cutting-edge native audio functionality for Live API. In addition to the standard Live API features, this preview model includes:

Enhanced voice quality and adaptability: Live API native audio provides richer, more natural voice interactions with 30 HD voices in 24 languages.
Introducing Proactive Audio: When Proactive Audio is enabled, the model only responds when it's relevant. The model generates text transcripts and audio responses proactively only for queries directed to the device, and does not respond to non-device directed queries.
Introducing Affective Dialog: Models using Live API native audio can understand and respond appropriately to users' emotional expressions for more nuanced conversations.

For more information on Live API, see our standalone Live API documentation.

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