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TTS Bench — Speed — 2026-05-31_0010

Rig: windows-5090 — AMD Ryzen 9 9950X3D 16-Core Processor (16C) · NVIDIA GeForce RTX 5090 32GB · 126 GB RAM · Windows 11

Label: zonos/cpu default re-run (CUDA_VISIBLE_DEVICES=-1 fix)

TTFA = time to first audio (ms; lower is better). RTFx = realtime speed (× realtime; higher is better; e.g. 10× means 10 sec of audio generated per 1 sec of compute). Cold = first run after process start; warm = subsequent runs.

Speed winners

Fastest predefined-voice: no data

Fastest cloning-capable: Zonos v0.1 (cpu) — 0.12× warm RTFx, 60.57s warm TTFA

Model	Device	TTFA cold	TTFA warm	RTFx cold	RTFx warm	Peak RAM	Peak VRAM	Size	Released
Zonos v0.1	cpu	62.12s	60.57s	0.12×	0.12×	7.39 GB	—	1.6B	Feb 2025