MODEL REFERENCE / GOOGLE

Gemini 3.8 Flash TTS
verified model reference.

Google's flagship production text-to-speech model for high-fidelity, expressive long-form and multi-speaker audio generation.

8,192context tokens

16,384max output

2026-10-06last verified

PRIMARY-SOURCE VERIFIED

Gemini 3.8 Flash TTS at a glance.

Google documents a 8,192-token context window. Input modalities: text. Output: audio. Pricing status: Official paid API.

MODEL IDgemini-3.8-flash-tts

CONTEXT WINDOW8,192tokens

MAX OUTPUT16,384

KNOWLEDGE CUTOFFNot published

STANDARD INPUT$0.50per 1 million tokens

STANDARD OUTPUT$9.00per 1 million tokens

CAPABILITY CONTRACT

Published model behavior.

REASONING

Not published

Only provider-documented reasoning controls are shown; missing controls remain unpublished rather than inferred.

INPUT

text

Input modalities come from the cited official model documentation.

OUTPUT

audio

Output modality and output-limit claims remain separate so an undocumented token cap is not guessed.

PRICING STATUS

Official paid API.

$0.50 input · $0.125 cached · $9.00 output per 1 million tokens.

SXF preserves the provider-published native billing basis. Only calculator-eligible generative token models enter token-cost arithmetic; specialist units and input-only embeddings remain visible without forced conversion.

CAVEATS

What the source record does not assume.

Google lists Gemini 3.8 Flash TTS as generally available as of September 22, 2026.

Standard pricing uses text input tokens and audio output tokens; audio output tokens correspond to 25 tokens per second.

The model is excluded from the generic generative token calculator because its output-token dimension represents audio rather than text.

EXPLORE

Keep the model in context.

OFFICIAL SOURCES

Verification links.

ai.google.dev/gemini-api/docs/models/gemini-3.8-flash-tts↗ai.google.dev/gemini-api/docs/pricing↗ai.google.dev/gemini-api/docs/changelog↗

WHAT CHANGED

Gemini 3.8 Flash TTS: what changed.

No post-baseline factual changes recorded for Gemini 3.8 Flash TTS since 2026-10-06.

VERIFIED BASELINE2026-10-06Current facts remain aligned with the SXF ledger.

VERIFIED CHANGE HISTORY

Gemini 3.8 Flash TTS verified history.

Open ledger JSON ↗

BASELINE2026-10-06