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Smallest AI•March 27, 2026
Lightning v3.1 Pro
Paid
text-to-speech
AI
real-time
speech synthesis
### TL;DR
Lightning v3.1 Pro is a premium text-to-speech model developed by Smallest AI, offering high-fidelity, real-time speech synthesis with a curated voice catalog across American, British, and Indian accents. It supports English and Hindi languages, including code-switching, and operates at a native sample rate of 44.1 kHz for broadcast-quality audio. Designed for conversational AI and live streaming, it offers ultra-low latency and streaming capabilities via HTTP, SSE, and WebSocket transports. The model is accessible through Smallest AI's API, with pricing based on usage without upfront commitments or minimums.
Key Insights & Metrics
Pricing
Pay-as-you-go model; no upfront commitments or minimums. Credits do not expire monthly.
Cost structure
Version
3.1 Pro
Current release version
Hardware
NVIDIA L40S with 48 GB VRAM
Compute requirements
Category
Paid
Licensing model
Region
United States
Primary region
Key Features
- High-fidelity 44.1 kHz audio
- Real-time optimized for low-latency applications
- Supports English and Hindi with code-switching
- Curated voice catalog across multiple accents
- Streaming capabilities via HTTP, SSE, and WebSocket
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