Model comparison
Compare GPT-Live 1 and Gemini 3.8 Live Extended Thinking using the same provider-sourced voice & realtime rubric. No mystery score and no invented benchmark ranking.
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.
A separate Gemini voice model that works through complex requests in the background while keeping the conversation going.
Integration differs from standard Live: tools must be asynchronous, and the app must track interaction_status. A finished utterance does not mean the background task has finished.
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 3.8 Live Extended Thinking |
|---|---|---|
| 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 | Speech-to-speech with visual input and background reasoning |
| 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| LanguagesProvider-documented language coverage or a clear unpublished marker.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 | Async functions only, 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 prompts and responses are not used to improve its products. Unpaid-service content generally may be used, with different treatment for EEA, UK, and Swiss users; check the current terms for your account and region.
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 3.8 Live Extended Thinking: A separate Gemini voice model that works through complex requests in the background while keeping the conversation going.
Consider GPT-Live 1 when your priority is Natural customer-service and scheduling calls. Consider Gemini 3.8 Live Extended Thinking when your priority is Multi-step voice support workflows. 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.
