Model comparison
Compare GPT-Live 1 and Gemini 3.1 Flash Live Preview using the same provider-sourced voice & realtime rubric. No mystery score and no invented benchmark ranking.
Facts checked September 11, 2026
Quick take
OpenAI's full-duplex voice frontend for natural conversation that delegates deeper reasoning and actions to a separate backend agent.
Speech interruption does not automatically cancel backend work. Your application still owns permissions, confirmations, cancellation, durable task state, result validation, and playback safeguards.
Google's preview audio-to-audio model for low-latency dialogue with multimodal awareness, thinking, search grounding, and function calling.
The model is preview, and paid versus unpaid projects have different data-use terms. Confirm both before capturing sensitive conversations.
Compare the published facts
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| Voice & realtime | GPT-Live 1 | Gemini 3.1 Flash Live Preview |
|---|---|---|
| Price basisToken-, character-, or minute-based price for the listed access route. | $0.05 / voice minute + backend usage | Audio $0.005/min in · $0.018/min out |
| Interaction modeSpeech-to-speech, audio-to-audio, or streamed text-to-speech behavior. | Full-duplex voice frontend with delegated backend | Realtime audio-to-audio, multimodal input |
| Published latencyProvider-published measurement with its stated exclusions; not a Cody test. | Not published | Not published |
| LanguagesProvider-documented language coverage or a clear unpublished marker. | Multiple accents, dialects, and languages; exact list not published | Multilingual; verify current Live API support |
| Tools & controlNative function calling, reasoning, or speech-control features. | Responses or client delegation to backend agents and tools | Function calling and search grounding |
| Context or input limitDocumented token or character limit where it is meaningful. | Not published | 131,072 input · 65,536 output |
How to choose
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
OpenAI says API content is not used for training by default. Default abuse-monitoring logs may be retained up to 30 days, with additional controls available to qualifying organizations.
Provider and API links
Google says paid Gemini API content is not used to improve its products; unpaid service data generally can be. Confirm billing status and current terms before sending sensitive conversations.
Provider and API links
Frequently asked questions
GPT-Live 1: OpenAI's full-duplex voice frontend for natural conversation that delegates deeper reasoning and actions to a separate backend agent. Gemini 3.1 Flash Live Preview: Google's preview audio-to-audio model for low-latency dialogue with multimodal awareness, thinking, search grounding, and function calling.
Consider GPT-Live 1 when your priority is Natural customer-service and scheduling calls. Consider Gemini 3.1 Flash Live Preview when your priority is Multimodal voice assistants. Test both with your own data and provider route before committing.
No. This comparison aligns provider-published facts for the Voice & realtime category. It does not claim a universal winner or combine incompatible third-party benchmark scores.
