OpenAI Realtime API vs Pipecat
as AI assistants see them, week of 2026-09-21
Pipecat edges out OpenAI Realtime API overall, scoring 11 versus 8 out of 100, and shows up more often too — 13 of 60 answers compared to 9 of 60. Pipecat's standout moment is a clean sweep: named in all 3 of 3 answers for best open-source voice AI agent framework. OpenAI Realtime API's strongest showing is lowest latency, named in 2 of 3 answers. Head-to-head, Pipecat leads on 4 questions, OpenAI Realtime API leads on 2, and they tie on 14. Neither gets mentioned for call analytics, AI receptionists, or contact-centre platforms.
Head to head
| metric | OpenAI Realtime API | Pipecat |
|---|---|---|
| score | 8 | 11 |
| questions won | 8 | 11 |
By assistant
OpenAI Realtime API
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 3 | 5% of answers | #7.0 |
| Claude | 22 | 40% of answers | #6.5 |
| Gemini | not sampled this week | ||
| Perplexity | 0 | 0% of answers |
Pipecat
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 4 | 5% of answers | #2.0 |
| Claude | 25 | 55% of answers | #8.9 |
| Gemini | not sampled this week | ||
| Perplexity | 4 | 5% of answers | #2.0 |
Where they differ
Only OpenAI Realtime API gets named for
- Which voice AI platform sounds the most natural?
Only Pipecat gets named for
- What's the best open-source voice AI agent framework?
- Which AI voice agent platform is cheapest per minute?
- What's the best AI voice agent that can transfer to a human?
- What's the best voice AI platform with its own phone numbers and telephony?
More comparisons
- OpenAI Realtime API vs Parloa
- OpenAI Realtime API vs Slang.ai
- Cognigy vs OpenAI Realtime API
- Goodcall vs OpenAI Realtime API
- OpenAI Realtime API vs Thoughtly
- Parloa vs Pipecat
Not sold on either?
Scores count how often each assistant names a product, weighted by position. How the score works · Full AI voice agents leaderboard