HeyGen Voice
HeyGen's text-to-speech model with preset voices on OpenRouter and Runware; on Runware it can also clone a voice from a recording.
Voice is a cloud text-to-speech model from HeyGen. It converts written text into natural, spoken audio. It offers a choice of 34 voices. It runs through Runware and OpenRouter using your own API key, from $0.015 per 1,000 characters.
- Released
- Oct 2026
- Pricing
- $0.015 / 1k chars
- Type
- Text-to-speech
- Voices
- 34 to choose from
Samples
Generated with Voice via OpenRouter: the same three scripts read by every text-to-speech model in the catalog, so the only thing that changes between two models’ clips is the model. Each model uses its own default voice; there is no shared voice to hold constant.
Baseline naturalness and pacing
The last train had already left, but she decided to walk anyway. The city was quieter than she remembered, and for the first time in weeks, she wasn't in a hurry.
Emotion, emphasis, and pauses
Wait — you're telling me it actually worked? After all that? I can't believe it. Honestly, I thought we'd lost the whole thing.
Decimals, percentages, version numbers
The API returned 3,481 results in 0.42 seconds, a 12 percent improvement over version 2.5. Latency at the 99th percentile dropped from 840 milliseconds to 610.
HeyGen
HeyGen builds AI video tools and models, including the general-purpose HeyGen Video model for short clips from text, images or reference media.
www.heygen.com ↗A lower-latency version of HeyGen Voice with the same preset voices on OpenRouter and Runware, and voice cloning on Runware.
HeyGen's general-purpose video model: clips of 5 to 15 seconds with synthesized dialogue, ambience and sound effects, from text, a starting image or reference media, at 480p or 768p.