Ultravox AI: Fast LLM for Realtime Voice

What it does

Cutting-edge AI speech for 5¢ per minute. Create and deploy highly effective and natural Voice Agents in no time.

Ultravox is a real-time voice AI infrastructure layer that powers fast, natural, and scalable voice agents.

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  Voice bots with 500ms response times2024 · fastvoiceagent.cerebrium.ai · ▲315

  Last year when GPT-4 was released I started making lots of little voice + LLM experiments. Voice interfaces are fun; there are several interesting new problem spaces to explore. I'm convinced that voice is going to be a bigger and bigger part of how we all interact with generative AI. But one thing that's hard, today, is building voice bots that respond as quickly as humans do in conversation. A 500ms voice-to-voice response time is just barely possible with today's AI models. You can get down to 500ms if you: host transcription, LLM inference, and voice generation all together in one place;…

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  Daily Bots2024 · daily.co · ▲223

  Build voice-to-voice AI agents with any LLM with Open Source

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  Real-time AI Voice Chat at ~500ms Latency2025 · github.com · ▲524

  Have a natural, spoken conversation with AI! Contribute to KoljaB/RealtimeVoiceChat development by creating an account on GitHub.

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  AI Voice Cloning by Wavel2023 · wavel.ai · ▲360

  High-quality voice clones with just 60 seconds of audio

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  AQX2025 · ▲103

  Build AI voice agents to automate sales & support

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  Voice Agent APIApr 2026 · assemblyai.com · ▲118

  One API to build production-ready voice agents

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  Spira Maxima▲578

  Video model that turns script into viral social media videos

  AI · 19d ago · spira.ai

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  Germany's new sovereign AI model Kolibri▲424

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  AI · 20d ago · tej.as

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  Giving Opus 5.5 a simulated paint canvas▲392

  Paintings by AI models: programs run through a simulation of oil paint.

  AI · 22d ago · stillwet.art

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  Beam.win▲378

  Run AI agents on one Mac and use its windows on another

  AI · 5d ago · beam.win

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  FastRouter.ai▲364

  Route requests to the right LLM for cost, latency & quality

  AI · 23d ago · fastrouter.ai

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  I made an open-source laptop from scratch▲3,237

  Hello! I'm Byran. I spent the past ~6 months engineering a laptop from scratch. It's fully open-source on GH at: https://github.com/Hello9999901/laptop

  Dev tools · 2025 · byran.ee

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  Tetris in a PDF▲1,289

  I realized that the PDF engines of modern desktop browsers (PDFium and PDF.js) support JavaScript with enough I/O primitives to make a basic game like Tetris. It was a bit tricky to find a union of features that work in both engines, but in the end it turns out that showing/hiding annotation "fields" works well to make monochrome pixels, and keyboard input can be achieved by typing in a text input box. All in all it's quite janky but a nice reminder of how general purpose PDF scripting can be. The linked PDF is all ASCII so you can just open it in a text editor, or have a look at…

  Life & fun · 2025 · th0mas.nl

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  21st.dev▲1,211

  I originally built this app to organize and reuse interesting React + Tailwind components I came across on Twitter, inspired by the shadcn/ui approach. Later, a friend started contributing their own components, and it got me thinking—this could grow into something bigger, like an NPM for design engineers to share and use components. Would love to hear your thoughts!

  Dev tools · 2025 · 21st.dev

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  JoggAI 2.0: AI Avatar Generator▲967

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  AI · 2025 · jogg.ai

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  Lovable + Builder.io▲873

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  Dev tools · 2025 · figma.com

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  Cs16.css – CSS library based on Counter Strike 1.6 UI▲819

  CSS library based on Counter Strike 1.6 UI.

  Life & fun · 2025 · cs16.samke.me