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OpenAI Realtime API
What ChatGPT, Claude, Gemini & Grok actually say · July 2026 · incumbent
The verdict
OpenAI Realtime API appears in 1 AI-ranked category.
GPT #4Claude —Gemini —
Best raw realtime intelligence and multimodal capability, strong reasoning/tool use, natural turn-taking, and likely the highest ceiling for custom voice products
What would move OpenAI Realtime API up
- GPT Become a fuller voice-agent platform with native telephony, campaign tooling, analytics, and deployment operations
Top alternatives per the models: Vapi · Retell AI · ElevenLabs Agents · Bland AI
Rankings are computed from what the models answer, re-polled continuously · raw reasoning shown verbatim · methodology