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

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 that features thinking capabilities, which lets you see the thinking process that the model goes through when generating its response.

Model Variant	Description	Key Features
Gemini 2.5 Flash	The best model for price and performance, offering well-rounded capabilities.	Features thinking capabilities to show its reasoning process.
Gemini 2.5 Flash with Live API native audio (Preview)	Integrates cutting-edge native audio functionality for advanced voice interactions.	Enhanced voice quality with 30 HD voices in 24 languages. Proactive Audio for context-aware responses. Affective Dialog for understanding user emotions.

For even more detailed technical information on Gemini 2.5 Flash (such as performance benchmarks, information on our training datasets, efforts on sustainability, intended usage and limitations, and our approach to ethics and safety), see our technical report on our Gemini 2.5 models and the model card for Gemini 2.5 Flash.

2.5 Flash

Note: The gemini-live-2.5-flash version of Gemini 2.5 Flash is available as a private general availability offering. Reach out to your Google account team representative to request access.

Try in Vertex AI View in Model Garden (Preview) Deploy example app

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`
Supported inputs & outputs	Inputs: Text, Code, Images, Audio, Video Outputs: Text
Token limits	Maximum input tokens: 1,048,576 Maximum output tokens: 65,535 (default)
Capabilities	Supported Grounding with Google Search Code execution Tuning System instructions Structured output Batch prediction Function calling Count Tokens Live API Preview feature Thinking Context caching Vertex AI RAG Engine Chat completions Not supported
Usage types	Supported Provisioned Throughput Dynamic shared quota Not supported Fixed quota
Usage types	Input size limit	500 MB
	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: 0.0-2.0 (default 1.0) topP: 0.0-1.0 (default 0.95) topK: 64 (fixed) candidateCount: 1–8 (default 1)
Supported regions
	Model availability (Includes dynamic shared quota & Provisioned Throughput)	Global global United States us-central1 us-east1 us-east4 us-east5 us-south1 us-west1 us-west4 Europe europe-central2 europe-north1 europe-southwest1 europe-west1 europe-west4 europe-west8 europe-west9⁺
	ML processing	United States Multi-region Canada northamerica-northeast1 Europe Multi-region europe-west1^* Asia Pacific asia-northeast1^* asia-northeast3^* asia-south1^* asia-southeast1 australia-southeast1^*
	See Data residency for more information.
Knowledge cutoff date	January 2025
Versions	`gemini-2.5-flash` Launch stage: GA Release date: June 17, 2025 Discontinuation date: June 17, 2026 `gemini-live-2.5-flash` Launch stage: Private GA Release date: June 17, 2025 `gemini-2.5-flash-preview-05-20` Launch stage: Public preview Release date: May 20, 2025 Discontinuation date: July 15, 2025 `gemini-2.5-flash-preview-04-17` Launch stage: Public preview Release date: April 17, 2025 Discontinuation date: July 15, 2025
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 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.

Try in Vertex AI

Technical specifications
Model ID	`gemini-live-2.5-flash-preview-native-audio`
Supported inputs & outputs	Inputs: Audio, Video Outputs: Audio
Token limits	Maximum input tokens: 1,048,576 Maximum output tokens: 128K (default)
Capabilities	Supported Grounding with Google Search Function calling Live API Preview feature Not supported Code execution Tuning System instructions Structured output Batch prediction Thinking Context caching Vertex AI RAG Engine Chat completions
Usage types	Supported Fixed quota Not supported Provisioned Throughput Dynamic shared quota
Input size limit	500 MB
	Video	Maximum screenshare length: Approximately 10 minutes Supported MIME types: `video/x-flv`, `video/quicktime`, `video/mpeg`, `video/mpegs`, `video/mpg`, `video/mp4`, `video/webm`, `video/wmv`, `video/3gpp`
	Audio	Maximum conversation length: Approximately 10 minutes 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: 0.0-2.0 (default 1.0) topP: 0.0-1.0 (default 0.95) topK: 64 (fixed) candidateCount: 1–8 (default 1)
Supported regions
	Model availability	United States us-central1
	See Data residency for more information.
Knowledge cutoff date	January 2025
Versions	`gemini-live-2.5-flash-preview-native-audio` Launch stage: Public preview Release date: June 17, 2025
Security controls
Security controls	See Security controls for more information.
Pricing	See Pricing.

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2.5 Flash

Live API native audio

Gemini 2.5 Flash