Sarvam AI: Bulbul V4 Flash

One API key. Live prices. Ready-to-run code.

Bulbul v4 Flash is Sarvam AI's low-latency text-to-speech model for Indian languages, built for voice agents, IVR and other real-time speech.

Served on OneInfer by Sarvam. Use it with the same API key and pay-as-you-go wallet as every other model in the catalog.

ProviderSarvamsarvam/bulbul:v4-flash

Call Bulbul V4 Flash in 4 steps

Step 1 of 4

Create a key in the Console. The same key works for every model on OneInfer.

OverviewProvidersPricingBenchmarksAPI and quickstartReviews
Context
2500
Input
text
Output
audio
Tool calling
Not listed

About this model

Bulbul v4 Flash is Sarvam AI's low-latency text-to-speech model for Indian languages, built for voice agents, IVR and other real-time speech. It has 224 voice personas, each one speaker in one language and style, across Hindi, English, Hindi-English code-mixed, Bengali, Gujarati, Kannada, Marathi, Punjabi, Tamil, Telugu and Assamese, with pace, pitch and loudness controls. A request takes up to 2,500 characters.

Input modalities

  • text

    Accepted as model input

Providers

Available routing options for this model through OneInfer.

  • Sarvam
    Available
    Text to speech
    $10.309 / 1M characters
    Routing
    OneInfer optimized

Pricing

Current OneInfer pricing for this model.

UsagePrice
Text to speechTTS$10.309 / 1M characters

Performance and benchmarks

Independent evaluations and live cluster operational metrics

We haven’t measured this model yet.

API guide

API docs

  1. Generate your access token

    Use your API key to generate the JWT access token required by the Models API.

  2. Add the JWT token

    Copy the generated JWT token and replace JWT_TOKEN in the example below.

  3. Check your credits

    If your balance is too low, before calling the model.

  4. Run the API example

    Choose your preferred language, copy the example, and send your first model request.

    curl -X POST https://api.oneinfer.ai/v1/ula/generate-audio \
  -H "Authorization: Bearer YOUR_JWT_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "sarvam/bulbul:v4-flash",
  "prompt": "OneInfer makes AI inference simple.",
  "stream": false,
  "voice_id": "shubh_enhi_ads",
  "format": "mp3"
}'

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