Smallest.ai text-to-speech models & pricing
2 models listed · appears on 3 of 3 boards · from $19.50/1M
Voice AI company focused on fast, low-cost synthesis with the Lightning model family.
Models on the boards
ModelReleased$/1M charsBoardsComposite
Lightning V3.1 Pro (Jul 2026)Jul 2026$19.52/359.0
Lightning v3.1Mar 2026$25.02/317.0
Latency from public benchmarks
Time to first audio, in milliseconds, as each benchmark publishes it. We don't measure latency ourselves, and the sources measure differently (harness, region, sample size), so each figure stays under its own source. Not part of the composite score.
ModelCoval, Time to first audio, p50, us-east-1, millisecondsSpeko, Time to first audio, p50, US East, millisecondsHumanness Index, Time to first audio, median, milliseconds
Lightning V3.1 Pro (Jul 2026)369 ms7-day window to Oct 11, 2026——
Lightning v3.1—173 msmeasured Jul 3, 2026420 msmeasured June 2026
Coval: Time to first audio, p50, us-east-1, read Oct 11, 2026 · Speko: Time to first audio, p50, US East, read Oct 11, 2026 · Humanness Index: Time to first audio, median, read Oct 11, 2026. How latency is sourced.