Async 1.5 Flash is Async's text to speech model. A fast-tier LLM from Async optimized for low-latency, high-throughput text generation at the 1.5 generation level.
Specifications
Canonical IDasync-1-5-flash
TypeText to Speech
StatusActive
CreatorAsync
Input ModalitiesText
Output ModalitiesAudio

Capabilities

Input1/5
Text
Image·
Audio·
Video·
PDF·
Output1/5
Text·
Image·
Audio
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Other Models

ModelTierReleasedContextInput / 1MOutput / 1M
Async 1 ProPro

Model IDs

async-1-5-flash
async-flash-v1-5