PyAI vs OpenAI Realtime API · as of June 2026
PyAI vs OpenAI Realtime API
PyAI Omni is a flat $0.05/min for speech + brain plus optional $0.01/min telephony. OpenAI Realtime is a raw model with token and audio math and no managed telephony. Cheaper per token is not an all-in product comparison.
PyAI
Keep prompts, tools, and business logic; adapt the realtime transport to Omni.
OpenAI Realtime API
Public pricing as of June 2026.
TL;DR
- Flat $0.05/min speech + brain vs variable token and audio math
- Managed telephony is optional at $0.01/min. OpenAI Realtime does not include it
- ~390 ms voice-to-voice, in-region, tuned for 8 kHz phone audio
- Choose OpenAI when you want the broad model platform and will build telephony yourself
How much does PyAI cost vs OpenAI Realtime API?
PyAI: $0.05/min Omni speech + brain; managed telephony is separate at $0.01/min.
| PyAI | OpenAI Realtime API | |
|---|---|---|
| Price shape | $0.05/min speech + brain, flat per minute | Token and audio pricing that varies by model and usage |
| Telephony | Optional managed telephony at $0.01/min | Not a product. You wire a carrier. |
| What it is | A voice-agent product with turn-taking and call control | A raw realtime model. You still build the agent. |
| When they win | Production phone agents with a bill you can forecast | Broad model platform when you will own telephony and orchestration |
PyAI latency is an in-region early measurement, not an SLA.
How fast is PyAI vs OpenAI Realtime API?
~390 ms median voice-to-voice, in-region, human conversational pace, with barge-in. Early measurement, not an SLA. We do not claim fastest speech-to-speech.
Methodology and test conditions live on the benchmarks page. Every published latency number is in-region.
Why teams pick PyAI over OpenAI Realtime API
One model runs the whole call - not a stitched pipeline.
One speech-to-speech model, not seven boxes
Omni is a single model: audio in, audio out. No stitching STT, VAD, turn detection, an LLM, RAG, and TTS together - so there's one thing to ship and nothing between the hops to break.
Built for telephony (8 kHz)
Tuned for narrowband phone audio, not studio takes, so accuracy and turn-taking hold up on real lines.
Human conversational pace, with barge-in
~390 ms median voice-to-voice (in-region) with barge-in and warm transfer - conversations feel like a person, not a walkie-talkie. Early in-region measurement, not an SLA.
Grounded, tool-using, and explicit
Answers from your knowledge base, calls your tools, and uses a documented native frame protocol. Realtime migrations require an audio and control-event adapter.
The chart
All-in price per minute (USD)
Lower is better. PyAI in teal. The bar spans each platform’s typical all-in range.
$0.05/min Omni or $0.08/min Agents Live Beta. *Managed telephony is $0.01/min separately.
Advertised from ~$0.09/min self-serve → all-in $0.11-$0.14/min once LLM, voice, and telephony are added.
Advertised agent minutes + LLM → all-in $0.10-$0.15/min once LLM, voice, and telephony are added.
Advertised no-code plans → all-in $0.11-$0.16/min once LLM, voice, and telephony are added.
Advertised ~$0.05/min platform fee → all-in $0.10-$0.31/min once LLM, voice, and telephony are added.
Advertised ~$0.07/min platform → all-in $0.13-$0.31/min once LLM, voice, and telephony are added.
PyAI bars are the published Omni and Agents rates. Managed telephony is $0.01/min separately. AI usage bills per second; telephony uses a 1-minute pulse. Packaged figures are the advertised platform fee plus STT/LLM/TTS/telephony passthrough estimates as of June 2026, composite and config-dependent, so verify before relying on them.
When OpenAI Realtime API is the better pick
OpenAI is the broad model platform; PyAI is intentionally narrow around voice and telephony.
Choose PyAI when teams willing to add a small wire adapter for telephony-focused behavior and predictable phone-agent billing.
FAQ
How much does PyAI cost vs OpenAI Realtime API?
PyAI: $0.05/min Omni speech + brain; managed telephony is separate at $0.01/min. OpenAI Realtime API: Token/audio pricing varies by model and usage; production calls can be materially higher than a flat minute rate. Public comparison data should be verified before procurement decisions.
How fast is PyAI vs OpenAI Realtime API?
~390 ms median voice-to-voice, in-region, human conversational pace, with barge-in. Early measurement, not an SLA. We do not claim fastest speech-to-speech.
When should I choose PyAI over OpenAI Realtime API?
Teams willing to add a small wire adapter for telephony-focused behavior and predictable phone-agent billing.
When is OpenAI Realtime API the better pick?
OpenAI is the broad model platform; PyAI is intentionally narrow around voice and telephony.
How do I test a replacement without a risky rewrite?
Start with one call path, use a PyAI test key and free credits, replay real calls, and compare quality, latency, completion rate, and all-in cost before routing production traffic.
One voice stack. One bill. Built for phone agents.
Start with $50 in free credit. No card.