Gemini 3.8 Flash Lite Tts

A Google speech model for voicing text at scale, sequential lines and voice workflows in 101 languages.

Ailoot · Text to speech POST /v1/audio/speech gemini-3.8-flash-lite-tts

About the model

This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below.

Gemini 3.8 Flash-Lite TTS is designed for large numbers of speech operations: reading text, voicing sequential lines and everyday voice workflows. According to Google, its profile is low latency and efficient processing at scale.

Selecting a voice

The model supports 101 languages, including Russian. Options include 30 preset voices, an expanded library, creation of a voice identity and reproduction of a voice from a sample. The voice, style and spoken line itself are specified separately, so text to be voiced does not need to be mixed with a description of the reading style.

Flash-Lite uses the same speech-control format as Gemini 3.8 Flash TTS. In dialogue, lines belong to specific speakers. The number of preset voices in one multi-voice request is limited to two; voices created from a description or sample are used in separate speech lines.

What is supplied as input

Input is text of up to 8192 tokens, and output is audio limited to 16,384 tokens. Delivery settings control the performance style, while short vocal events and pauses are specified with special audio tags inside the text. This is speech synthesis from a specified line, not generation of a text answer to a question.

Formats and processing

For an ordinary response, WAV is used by default. The default streaming format is headerless PCM. Original audio parameters are 24 kHz, one channel and 16 bits. The manufacturer also provides PCM, mu-law and A-law. Context caching and batch processing are supported. Audio format capabilities need to be considered separately from the actual way the selected speech method delivers a file.

Model boundaries

This version does not declare Thinking, function calling, code execution, file search, search grounding, Google Maps, structured text responses, image creation or use of URL contents. Its purpose is to voice prepared material quickly.

A low-latency design target does not set a completion deadline for every request. Language coverage, voice-selection methods and delivery control describe the model's own capabilities and do not mean that all settings are automatically available in every speech method.

Ailoot · Text to speech POST /v1/audio/speech gemini-3.8-flash-lite-tts

gemini-3.8-flash-lite-tts

Google /gemini-3.8-flash-lite-tts

Overview

A Google speech model for voicing text at scale, sequential lines and voice workflows in 101 languages.

Accepted inputs: Text
Results: Audio

Available in Ailoot · inputs & methods

Ailoot · Text to speech POST /v1/audio/speech

Input types: text
Output types: audio
Context: 8,192 tokens
Maximum output: 16,384 tokens
Output format: native audio bytes or JSON asset links

Field	Type	Requirement	Values & limits	Default
Field`model`	Type`string`	RequirementRequired	Values & limits gemini-3.8-flash-lite-tts	Default—
Field`input`	Type`string`	RequirementRequired	Values & limits Minimum length: 1	Default—
Field`voice`	Type`string`	RequirementOptional	Values & limits Achernar, Achird, Algenib, Algieba, Alnilam, Aoede, Arlo, Autonoe, Bodi, Brio, Callirrhoe, Charon, Cleo, Cruz, Daro, Despina, Elio, Enceladus, Enya, Enzo, Erinome, Fenrir, Finn, Fola, Gacrux, Gero, Hali, Iapetus, Jett, Jori, Kira, Knox, Koda, Kore, Laomedeia, Leda, Lora, Ludo, Lumi, Mako, Milo, Neno, Nika, Nyla, Olin, Orus, Puck, Pulcherrima, Rami, Rasalgethi, Riko, Rina, Sadachbia, Sadaltager, Sami, Schedar, Sola, Sulafat, Tari, Tavi, Tova, Umbriel, Varo, Veda, Vindemiatrix, Zali, Zeno, Zephyr, Zubenelgenubi, Zuri	DefaultKore
Field`response_format`	Type`string`	RequirementOptional	Values & limits , wav, json	Default
Field`stream_format`	Type`string`	RequirementOptional	Values & limits audio	Default—

Input material combinations

text_to_speech · Required: input

Method parameters and lifecycle

Parameter	Contract
Parameter`material_types`	Contracttext
Parameter`required`	Contractnull
Parameter`optional_controls`	Contractnull

Lifecycle: synchronous_result_then_owned_library

GET /v1/media/tasks/{task_id} · actual returned task_id or media library record

GET /v1/media/assets/{asset_id}/content

GET /v1/media/assets

GET /v1/media/assets/{asset_id}

Method shapes and IDs are exact; supplier capability is separate from admission.

Pricing

Ailoot method rates

Ailoot Text to speechPOST /v1/audio/speech

Input: $0.0005 / 1K
Output: $0.006 / 1K
Cache read: $0.000125 / 1K

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. How reservation and settlement work →

Example requests

Ailoot · Text to speech

Speech example

set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
: "${AILOOT_TEXT_FILE:?Set your actual UTF-8 narration script}"
export AILOOT_TEXT_FILE
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p=json.loads('{"model": "gemini-3.8-flash-lite-tts", "input": ""}')
f=Path(os.environ["AILOOT_TEXT_FILE"])
if not f.is_file():raise SystemExit("Choose your actual UTF-8 source material")
text=f.read_text(encoding="utf-8")
if not text.strip():raise SystemExit("Source material must contain text")
p["input"]=text
Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/audio/speech \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o speech.wav

Receive and save results

Ailoot · Text to speech

native audio bytes or JSON asset links

GET /v1/media/tasks/{task_id}
GET /v1/media/assets/{asset_id}/content
GET /v1/media/assets
GET /v1/media/assets/{asset_id}

Keep all completed results

Keep every complete returned response, file and content part.

A single output defaults to native audio bytes with actualContent-Type; response_format=json or multiple outputs returns all owned links. No requested MP3/Opus/AAC/FLAC/PCM conversion or SSE.

If the original response needs checking

Retain original operation_id/X-Client-Request-ID for reconciliation without resubmission; no dedicated audio poll route.

Response fields

Field	Type
Field`binary native audio`	Typebytes
Field`model`	Typestring
Field`response_id`	Typestring
Field`actual_count`	Typeinteger
Field`data[]`	Typeowned audio asset link

Errors and next steps

Response	Condition	Next step
Response400 · `invalid_request_error`	ConditionInvalid required fields, material representation or parameter value	Next stepCorrect the indicated fields before a new creation request.
Response`server_error`	ConditionThe returned response says the operation or result requires a check	Next stepKeep the original returned operation/task ID, request headers and response; continue supported reads of that original operation. Do not resubmit the creation request.

Aliases

Model aliases

Ailoot gemini-3.8-flash-lite-tts

Method path aliases

Use the method paths shown above.

Related caller IDs

gemini-3.8-flash-lite-tts

FAQ · Gemini 3.8 Flash Lite Tts

What inputs and results are available?: POST /v1/audio/speech · gemini-3.8-flash-lite-tts: text → audio
Which fields does the request use?: POST /v1/audio/speech · gemini-3.8-flash-lite-tts: model, input, voice, response_format, stream_format
What limits apply?: POST /v1/audio/speech · gemini-3.8-flash-lite-tts: ctx: 8192; max_out: 16384

Gemini 3.8 Flash Lite Tts