Gemini 3.8 Flash TTS

Google's flagship text-to-speech model for studio-grade voice fidelity, expressive acting, regional accents, and stable long-form multi-speaker audio.

Input price: $0.45list $0.50-10%
Output price: $8.10list $9.00-10%

Context: 8K
Max output: 16K
Modalities: InputTextOutputAudio

Capability: —
30-day uptime: —

Released: 2026-09-22
Knowledge cutoff: —

Providers

Providers that serve this model. With Auto, each request goes to the best available provider. Prices in USD per 1M tokens; stats cover the last 30 days.

AutoInput$0.45-10%Output$8.10-10%Cache read$0.45-10%Context8KMax output16KWe send each request to the best-priced healthy provider. You pay that provider’s price.Google (Gemini)Input$0.45-10%Output$8.10-10%Cache read$0.45-10%United StatesNo trainingNo retentionGoogle Vertex AIInput$0.45-10%Output$8.10-10%Cache read$0.45-10%GlobalNo training

Pricing

Prices vary by provider. Showing Google (Gemini), the lowest. Pick a provider above to see its prices.

Item	Price	Batch	Flex	Priority
until 2027-01-01
Inputper 1M tokens	$0.45list $0.50-10%	$0.225list $0.25-10%	$0.225list $0.25-10%	$0.81list $0.90-10%
Outputper 1M tokens	$8.10list $9.00-10%	$4.05list $4.50-10%	$4.05list $4.50-10%	$14.58list $16.20-10%
Cache readper 1M tokens	$0.45list $0.50-10%	$0.225list $0.25-10%	$0.225list $0.25-10%	$0.81list $0.90-10%
Audio outputper 1M tokens	$8.10list $9.00-10%	$4.05list $4.50-10%	$4.05list $4.50-10%	$14.58list $16.20-10%
from 2027-01-01
Inputper 1M tokens	$0.90list $1.00-10%	$0.45list $0.50-10%	$0.45list $0.50-10%	$1.62list $1.80-10%
Outputper 1M tokens	$16.20list $18.00-10%	$8.10list $9.00-10%	$8.10list $9.00-10%	$29.16list $32.40-10%
Cache readper 1M tokens	$0.90list $1.00-10%	$0.45list $0.50-10%	$0.45list $0.50-10%	$1.62list $1.80-10%
Audio outputper 1M tokens	$16.20list $18.00-10%	$8.10list $9.00-10%	$8.10list $9.00-10%	$29.16list $32.40-10%

Make a request

Set your provider preferences, then copy the request. It reads your API key from OHMYGPT_API_KEY.

curl https://api.ohmygpt.com/v1/models/google/gemini-3.8-flash-tts:generateContent \
  -H "x-goog-api-key: $OHMYGPT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {
        "parts": [
          {
            "text": "Hello"
          }
        ]
      }
    ]
  }'

Similar models

Other models with the same output types at a similar price.

Gemini 3.8 Flash TTSThis model

Capability: —
Input: $0.45
Output: $8.10

Gemini 3.8 Flash-Lite TTS

Capability: —
Input: $0.45
Output: $5.40