Learn about the Gemini models

The Gemini family of models are considered multimodal because they are capable of processing information from multiple modalities, including images, videos, and text. For example, you can send a Gemini model a photo of a plate of cookies and ask it to give you a recipe for those cookies.

Prompt	Response
Give me a recipe for these cookies.	**INGREDIENTS** - 1 c. (2 sticks) unsalted butter, softened - 3/4 c. granulated sugar - 3/4 c. brown sugar, packed - 1 tsp . vanilla extract - 2 large eggs - 2 1/4 c. all-purpose flour - 1 tsp. baking soda - 1 tsp. salt ...

You can interact with the Gemini family of models using the Gemini API provided by Vertex AI on Google Cloud. For mobile and web apps, you can use the Vertex AI in Firebase SDKs to call the Gemini API and interact with the Gemini models directly from your app.

This page provides the following information about the Gemini models:

• High-level comparison of the use cases for the various Gemini models, including their supported input types.

• Comparison of the details for each model, for example maximum input tokens or maximum length of video.

• Description of how Gemini models are versioned, specifically their stable, auto-updated, and preview versions.

• Lists of available model names to include in your code during initialization.

• List of supported languages for the Gemini models.

Available models

You can use any of the following Gemini models with Vertex AI in Firebase:

• Gemini 1.5 Flash
  Multimodal model that supports the same input and output types as 1.5 Pro, but with a long-context understanding of 1 million tokens. Gemini 1.5 Flash is specifically designed for high-volume, cost-effective applications.

• Gemini 1.5 Pro
  Multimodal model that supports adding image, audio, video, and PDF files in text or chat prompts for a text or code response. Also, it supports long-context understanding with 2 million tokens.

• Gemini 1.0 Pro Vision
  Multimodal model designed to handle text plus images and video for a text or code response. Cannot be used for chat.

• Gemini 1.0 Pro
  Model designed to handle natural language tasks, multiturn chat with text and code, and code generation.

Jump to model names to include in your code

You can start experimenting with the Gemini 2.0 model (gemini-2.0-flash-exp) using the Vertex AI in Firebase SDKs.
Right now, our SDKs support text output from text, code, image, PDF, audio, video, and video with audio inputs. Support for the Multimodal Live API as well as native audio and image output will be coming in 2025!

Use cases and capabilities for each model

Each Gemini model has different capabilities to support various use cases. You can learn more in the Google Cloud documentation about each of the Gemini models.

Supported input and output for each model

	Gemini 1.5 Flash	Gemini 1.5 Pro	Gemini 1.0 Pro Vision	Gemini 1.0 Pro
Input types
Text
Code
Image
PDF
Video (frames only)
Video (frames and audio)
Audio
Output types
Text
Structured output (like JSON) using response schema
Code

To learn about supported file types, see Supported input files and requirements for the Vertex AI Gemini API.

Supported capabilities and general features for each model

		Gemini 1.5 Flash	Gemini 1.5 Pro	Gemini 1.0 Pro Vision	Gemini 1.0 Pro
Text generation from text-only input
Text generation from multimodal input
Structured output (like JSON) using response schema
Multi-turn chat
Function calling
	Basic function calling
	Parallel function calling
	Function calling mode
Count tokens and billable characters
System instructions

Note: Context caching, fine tuning a model, embeddings, and semantic retrieval are supported by various models or the Vertex AI Gemini API, but they're not supported by the Vertex AI in Firebase SDKs.

Detailed information about each model

Important: For Vertex AI in Firebase SDKs, the maximum request size is 20 MB. You get an HTTP 413 error if a request is too large.

If a file's size will make the total request size exceed 20 MB, then you'll need to provide the file using a URL (for example, by using a Cloud Storage for Firebase URL). However, if a file is small, you can often pass it directly as inline data (note though, that a file provided as inline data is encoded to base64 in transit, which increases the size of the request).

Property	Gemini 1.5 Flash	Gemini 1.5 Pro	Gemini 1.0 Pro Vision	Gemini 1.0 Pro
Total token limit (combined input and output) *	1,048,576 tokens	2,097,152 tokens	16,384 tokens	32,760 tokens
Output token limit *	8,192 tokens	8,192 tokens	2,048 tokens	8,192 tokens
Maximum number of images per request	3,000 images	3,000 images	16 images	N/A
Max base64 encoded image size	7 MB	7 MB	7 MB	N/A
Maximum PDF size	30 MB	30 MB	30 MB	N/A
Maximum number of video files per request	10 video files	10 video files	1 video file	N/A
Maximum video length (frames only)	~60 minutes of video	~60 minutes of video	2 minutes	N/A
Maximum video length (frames and audio)	~45 minutes of video	~45 minutes of video	N/A	N/A
Maximum number of audio files per request	1 audio file	1 audio file	N/A	N/A
Maximum audio length	~8.4 hours of audio	~8.4 hours of audio	N/A	N/A

^{* For all Gemini models, a token is equivalent to about 4 characters, so 100 tokens are about 60-80 English words. You can determine the total count of tokens in your requests using countTokens.}

Important: Quotas and pricing are different for each model. Pricing also depends on input and output.

Learn about supported file types, how to specify MIME type, and how to make sure that your files and multimodal requests meet the requirements and follow best practices in Supported input files and requirements for the Vertex AI Gemini API.

Versioning of the models

The Gemini models are offered in stable, auto-updated, and preview versions.

• Stable versions are considered Generally Available.

  • Stable versions have model names appended with a specific three digit version number, for example gemini-1.5-pro-002.

• Auto-updated versions always point to the latest stable version of that model; if a new stable version is released, the auto-updated version automatically starts pointing to that new stable version.

  • Auto-updated versions have model names with no appendage, for example gemini-1.5-pro.

• Preview versions have new capabilities and are considered not stable. Note that preview versions always point to the latest preview version of that model; if a new preview version is released, any existing preview version automatically starts pointing to that new preview version.

  • Preview versions have model names appended with -preview along with the model's initial release date (-MMDD), for example gemini-1.5-pro-preview-0409 (released on April 9, 2024).

Learn more about the available Gemini model versions and their lifecycle in the Google Cloud documentation.

Important: For production use cases, we recommend using the most recent stable version. Even though an auto-updated version points to a stable version, the actual model version it points to will automatically change whenever a new stable version is released, which could mean unexpected behavior or responses. Also, preview versions are only recommended during prototyping.

Available model names

Model names are the explicit values that you include in your code during initialization of the generative model (which is a required step to call the Gemini API). For initialization examples for your language, see the getting started guide.

Note: There's no API for programmatically listing available model names.

Gemini 1.5 Flash model names

Model name	Description	Release stage	Initial release date	Discontinuation date
Stable versions
gemini-1.5-flash-002	Latest stable version of Gemini 1.5 Flash	General Availability	2024-09-24	No earlier than 2025-09-24
gemini-1.5-flash-001	Initial stable version of Gemini 1.5 Flash	General Availability	2024-05-24	No earlier than 2025-05-24
Auto-updated version
gemini-1.5-flash	Points to the latest stable version of 1.5 Flash (currently gemini-1.5-flash-002)	General Availability	2024-09-24	---

Gemini 1.5 Pro model names

Model name	Description	Release stage	Initial release date	Discontinuation date
Stable versions
gemini-1.5-pro-002	Latest stable version of Gemini 1.5 Pro	General Availability	2024-09-24	No earlier than 2025-09-24
gemini-1.5-pro-001	Initial stable version of Gemini 1.5 Pro	General Availability	2024-05-24	No earlier than 2025-05-24
Auto-updated version
gemini-1.5-pro	Points to the latest stable version of 1.5 Pro (currently gemini-1.5-pro-002)	General Availability	2024-09-24	---

Gemini 1.0 Pro Vision model names

Model name	Description	Release stage	Initial release date	Discontinuation date
Stable versions
gemini-1.0-pro-vision-001	Latest stable version of Gemini 1.0 Pro Vision	General Availability	2024-02-15	No earlier than 2025-02-15
Auto-updated version
gemini-1.0-pro-vision	Points to the latest stable version of 1.5 Pro Vision (currently gemini-1.5-pro-vision-001)	General Availability	2024-01-04	---

Gemini 1.0 Pro model names

Model name	Description	Release stage	Initial release date	Discontinuation date
Stable versions
gemini-1.0-pro-002	Latest stable version of Gemini 1.0 Pro	General Availability	2024-04-09	No earlier than 2025-04-09
gemini-1.0-pro-001	Stable version of Gemini 1.0 Pro	General Availability	2024-02-15	No earlier than 2025-02-15
Auto-updated version
gemini-1.0-pro	Points to the latest stable version of 1.0 Pro (currently gemini-1.0-pro-002)	General Availability	2024-02-15	---

Supported languages

• All the Gemini models can understand and respond in the following languages:

  Arabic (ar), Bengali (bn), Bulgarian (bg), Chinese simplified and traditional (zh), Croatian (hr), Czech (cs), Danish (da), Dutch (nl), English (en), Estonian (et), Finnish (fi), French (fr), German (de), Greek (el), Hebrew (iw), Hindi (hi), Hungarian (hu), Indonesian (id), Italian (it), Japanese (ja), Korean (ko), Latvian (lv), Lithuanian (lt), Norwegian (no), Polish (pl), Portuguese (pt), Romanian (ro), Russian (ru), Serbian (sr), Slovak (sk), Slovenian (sl), Spanish (es), Swahili (sw), Swedish (sv), Thai (th), Turkish (tr), Ukrainian (uk), Vietnamese (vi)

• Gemini 1.5 Pro and Gemini 1.5 Flash models can understand and respond in the following additional languages:

  Afrikaans (af), Amharic (am), Assamese (as), Azerbaijani (az), Belarusian (be), Bosnian (bs), Catalan (ca), Cebuano (ceb), Corsican (co), Welsh (cy), Dhivehi (dv), Esperanto (eo), Basque (eu), Persian (fa), Filipino (Tagalog) (fil), Frisian (fy), Irish (ga), Scots Gaelic (gd), Galician (gl), Gujarati (gu), Hausa (ha), Hawaiian (haw), Hmong (hmn), Haitian Creole (ht), Armenian (hy), Igbo (ig), Icelandic (is), Javanese (jv), Georgian (ka), Kazakh (kk), Khmer (km), Kannada (kn), Krio (kri), Kurdish (ku), Kyrgyz (ky), Latin (la), Luxembourgish (lb), Lao (lo), Malagasy (mg), Maori (mi), Macedonian (mk), Malayalam (ml), Mongolian (mn), Meiteilon (Manipuri) (mni-Mtei), Marathi (mr), Malay (ms), Maltese (mt), Myanmar (Burmese) (my), Nepali (ne), Nyanja (Chichewa) (ny), Odia (Oriya) (or), Punjabi (pa), Pashto (ps), Sindhi (sd), Sinhala (Sinhalese) (si), Samoan (sm), Shona (sn), Somali (so), Albanian (sq), Sesotho (st), Sundanese (su), Tamil (ta), Telugu (te), Tajik (tg), Uyghur (ug), Urdu (ur), Uzbek (uz), Xhosa (xh), Yiddish (yi), Yoruba (yo), Zulu (zu)

Note: These languages are not the locations supported by the Vertex AI service and the Gemini models; these are the languages that the models can understand and respond in (like the text input and output). If needed, learn more about supported locations.

Next steps

Try out the capabilities of the Gemini API

• Build multi-turn conversations (chat).
• Generate text from text-only prompts.
• Generate text from multimodal prompts (including text, images, PDFs, video, and audio).
• Generate structured output (like JSON) from both text and multimodal prompts.
• Use function calling to connect generative models to external systems and information.