Open-sourced VoxCPM 1.5 TTS beats Orpheus on cost-per-concurrency by 4.5x
TheMoonMidas · x · 2026-09-06
- A developer open-sourced VoxCPM 1.5 (from OpenBMB) with two LoRAs trained on Orpheus TTS audio, enabling same-voice comparisons.
- Benchmarks: 50 concurrent generations at RTF ≈ 1 on an L40S with VoxCPM, vs 16 concurrent streams on an A100 with Orpheus — a 4.5x price×concurrency gap in VoxCPM's favor.
- OpenBMB has since released VoxCPM2; the author notes swapping Vox 1.5 out for it is straightforward.
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