gemini-2.5-flash-preview-tts

Name: gemini-2.5-flash-preview-tts
Author: Google Vertex AI

ttsproprietary

Our fastest engine for high-fidelity speech synthesis, offering low-latency and cost-efficient audio generation. Gemini 2.5 Flash TTS is best for real-time assistants, high-volume narration, and conversational use cases that require fine-grained control over voice style and pacing.

Context

Max output

16K

Input price

$0.3/1M tokens

Output price

$2.5/1M tokens

Capabilities

Show unsupported (7)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Batch Processing

Details

ProviderGoogle Vertex AI

CreatorGoogle AI

Familygemini-2.5

Licenseproprietary

Statusactive

Typetts

Input modalitiesaudio, image, text

Output modalitiesspeech

Open weightNo

Parameters—

Architecture—

Max chars—

Sample rate—

Voices—

Languages—

Release date—

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Endpoints

Generate ContentPOST

Generate text from multimodal inputhttps://us-central1-aiplatform.googleapis.com/v1beta/models/{model}:generateContent

Stream ContentPOST

Stream text generation responseshttps://us-central1-aiplatform.googleapis.com/v1beta/models/{model}:streamGenerateContent

Pricing

Text tokensPer 1M tokens

	Input	Cached input	Output
Standard	$0.3	—	$2.5
Priority	$0.54	—	$4.5
Flex	$0.15	—	$1.25

Family Comparison: gemini-2.5

Model	Caps	Perf	Speed	Context	Max out	Pricing
gemini-2.5-computer-use-preview-10-2025	RTJJMSB	—	—	128K	64K	—
gemini-live-2.5-flash-preview	S	—	—	—	—	—
gemini-2.5-flash-lite	RTJJMSB	—	—	1.0M	66K	$0.1$0.4
gemini-2.5-flash-image-preview	S	—	—	—	—	$0.3$2.5
gemini-2.5-flash-image	RTJJMSB	—	—	66K	33K	$0.3$2.5
gemini-2.5-flash-lite-preview-09-2025	RTJJMSB	—	—	1.0M	66K	$0.3$2.5
gemini-2.5-flash-native-audio-preview-12-2025	RTJJMSB	—	—	131K	8K	$0.3$2.5
gemini-2.5-flash-preview-05-20	S	—	—	—	—	$0.3$2.5
gemini-2.5-flash-preview-09-2025	RTJJMSB	—	—	1.0M	66K	$0.3$2.5
gemini-2.5-flash-preview-09-25	S	—	—	—	—	$0.3$2.5
gemini-2.5-flash-preview-tts	RTJJMSB	—	—	8K	16K	$0.3$2.5
gemini-2.5-flash	RTJJMSB	—	—	1.0M	66K	$0.3$2.5
gemini-2.5-pro-preview-03-25	S	—	—	—	—	$1.25$10
gemini-2.5-pro-preview-05-06	S	—	—	—	—	$1.25$10
gemini-2.5-pro-preview-06-05	S	—	—	—	—	$1.25$10
gemini-2.5-pro-preview-tts	RTJJMSB	—	—	8K	16K	$1.25$10
gemini-2.5-pro	RTJJMSB	—	—	1.0M	66K	$1.25$10

API

GET/v1/models/vertex/gemini-2.5-flash-preview-tts