Head-to-head
ElevenLabs Agents vs OpenAI Realtime API
OpenAI Realtime API leads: the AI models rank it above its rival on 1 of the 1 leaderboard they share. Based on how ChatGPT, Claude, Gemini & Grok rank both across the leaderboard they share — re-polled weekly, reasoning shown verbatim.
| Leaderboard | ElevenLabs Agents | OpenAI Realtime API |
|---|---|---|
| Best Speech-to-Speech APIs for Real-Time Voice Assistants | #3 / 9 | #1 / 9 |
Why the models rank ElevenLabs Agents — on best speech-to-speech apis for real-time voice assistants
“The strongest turnkey choice for production voice agents, combining highly expressive voices, low-latency streaming, telephony and SIP integrations, workflow tooling, observability, evaluations, and broad client SDK support”
Why the models rank OpenAI Realtime API — on best speech-to-speech apis for real-time voice assistants
“Best overall balance of natural low-latency speech-to-speech, strong reasoning and tool calling, reliable interruption handling, WebRTC/WebSocket support, and a mature Agents SDK; ranked first assuming a general-purpose assistant rather than a tightly controlled contact-center workflow”
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Ranks from the merged 4-model leaderboards · re-polled weekly · methodology