Introducing Phonon ・ Our first open, on-device TTS model

Build voice AIwith people who ship

Developers around the world are building voice agents, games, and tools on Gradium. Ask questions, share what you're building, and get answers from the team training the models.

Behind the build

Builders, researchers, and creators from all over the world
building the future of voice AI together

  • @Romane

    Paris, France

    Voice game
  • @Arthur

    Berlin, Germany

    Voice agent
  • @Pao

    Rio, Brésil

    Live translation
  • @Carla

    Turin, Italie

    Audiobook
  • @Lina

    Tunis, Tunisie

    Customer support
  • @Alex

    San Francisco, USA

    Language learning

DiscordIs where it happens

Join the Discord
  • Show your work
    Show your work

    Ship something, post it in #showcase. The best projects get featured in the gallery, the newsletter, and on our socials and qualify for bonus Gradium credits.

  • Get help
    Get help

    Ask a question about streaming, turn-taking, or a weird PCM mismatch and get an answer from someone who wrote the code, researchers or engineers.

  • Get early access
    Get early access

    Beta models land in the community first. Test them, tell us what breaks, and earn API credits for feedback that helps us improve the models.

Apps builtby the community

Little Voices

Ask the angel and the devil on your shoulder anything: a Pipecat app in Python on iPhone, with Phonon 31m giving both their voices, no network.

Harry Potter hat voice

Autonomous's robot, Lamp, puts on a sorting hat and talks in character, voiced by Phonon.

Phonon voice bot on Modal

A low-latency voice agent built with Pipecat on Modal. Phonon runs on the agent's CPU-only container, so first audio needs no network hop.

Magpie TTS meets Phonon

NVIDIA Magpie TTS meets Gradium Phonon: two open models in a scripted dialogue, Magpie in Adi's voice and Phonon in Sterling's.

Du coté de chez Swann

Proust's Du côté de chez Swann, read aloud page by page, with an Italian translation to read and hear alongside the French.

Xybrid game demo

A sci-fi video game on a desert planet, its voices generated by Phonon on the player's own machine.

Startbuilding

No credit card required