One voice model for phone agents. Not seven stitched boxes.
Stop gluing STT, an LLM, and TTS together like Vapi or Retell. Omni is one speech-to-speech model built for telephony, audio in, audio out, OpenAI-compatible, $0.05/min all-in. Start free, no card.
Answered by a PyAI Omni agent · may be recorded.
Tap a voice - no signup, no key.
Want it to say your own words?Open the Playground
One speech-to-speech model, built for the phone.
Vapi, Retell, and Bland stitch four vendors into every call, and the advertised platform fee is only one of the four bills. PyAI runs the whole call on one engine: ~390 ms median voice-to-voice in-region, first audio from Speak in ~53 ms warm in-region, and one all-in minute at $0.05.
The advertised platform fee is just the orchestration layer. Add the model, the voice, and telephony and the all-in minute lands at $0.10-0.31/min on the packaged platforms - plus the latency of every hop.
Public all-in ranges, Jun 2026 - advertised vs all-in, verify on each provider’s site.
One engine means no stacked vendor markups and no stacked latency - so the price is the price: one all-in minute, lower than any packaged platform. No platform fee to clear before the rate counts, no four-way bill to reconcile.
Four products to build on. One free way to start.
Omni API, Agents, Trace, and Cast carry production voice work. Hear, Speak, Telephony, AMD, and Recap are the building blocks underneath.
Omni
The definitive all-in-one AI voice agent model. Hybrid speech-to-speech, fused LLM brain, emotion-aware voices, and tool calling.
Agents
Manage, evaluate & ship AI voice agents. No code, no engineering.
Cast
Cinematic, emotional long-form TTS for podcasts, narration, and audiobooks.
Trace
Bulletproof compliance & QA on every single call, automatically.
Start free with your signup credit
Every account starts with $50.00 in free credit, no card. Ship with Hear, then scale into Omni, Agents, Trace, and Cast when you go to production.
Plugs into the stack you already run
Watch a call flow through PyAI, end to end
Tap play. One front-desk call - ring to CRM - with every step powered by a PyAI model you can click into.
Acme Dental’s front-desk agent - every step powered by PyAI.
Hear <-> Speak repeats every turn, with barge-in - then the call becomes data.
Each step is a PyAI model. Press play to watch them hand off - or tap any stage to jump.
- Hear
pyai-hear - Omni brain
pyai-omni-realtime - Speak
pyai-voice
Transcript, summary, intent, and disposition - emitted as JSON when the call ends.
Teams book more - and resolve faster - with PyAI.
From AI appointment booking to compliance on every call, here's what customers see.
“Our AI Agents book appointments 24/7 - that drove 57% incremental revenue for our customers. It's our hottest-selling product.”
“We run healthcare and TCPA-heavy lines. Trace auto-scores every call against our rule packs, so compliance stopped being a fire drill.”
“Time to first reply is under a minute and CSAT is at an all-time high - while our cost per resolution keeps dropping.”
{
"event": "amd",
"call_id": "CA7d0…",
"answered_by": "screening",
"answered_by_twilio": "machine_start",
"confidence": 0.96,
"decision_ms": 720,
"reason": "screening phrase: 'the person you're calling is using \
a screening service' at 0.6s"
}Every AMD decision carries a reason you can read. See how AMD works.
One headline price, then clear packages.
Start free with $50 in signup credit, then pay for Omni, Agents, Trace, and Cast as you use them.
Realtime voice agent API
Manage, evaluate & ship agents, no code
Compliance, QA, evals
Async emotional TTS
Hear starts at $0.001/min. Telephony, Recap, and KB Context are on the full rate card.
Using Cursor, Claude Code, Codex, or Lovable?
Start with one prompt. We hand your agent the API contract, the SDKs, and a free test key - so it writes correct PyAI code on the first try.
Questions, answered
Is PyAI OpenAI-compatible?
Yes. Point your OpenAI SDK at https://api.pyai.com/v1 with your PyAI key. Transcription and speech keep the same request and response shapes, and errors come back in the OpenAI envelope.
How much does it cost?
Hear is $0.001/min, Omni API is $0.05/min all-in, and Agents is $0.08/min. Every account starts with $50.00 in free credit, no card.
Is it good for telephony?
That's the focus. Hear is tuned for 8 kHz call audio with a ~185 ms first partial (in-region), and Omni runs phone agents at human conversational pace, ~390 ms median voice-to-voice in-region, with barge-in.
Do I need a credit card to start?
No. Your sandbox test key works instantly with free credit. Add funding only when you're ready for live traffic.
Ship phone agents on one speech-to-speech model.
Start with a free key and $50 in credit. Build on the same OpenAI-compatible stack you take to production with Omni, Agents, and Trace: natural turn-taking, telephony-native, live in an afternoon.
No credit card - OpenAI-compatible - cancel anytime