OpenAI has finally upgraded the model powering ChatGPT's voice mode with GPT-Live, which can delegate complex tasks to GPT-5.5 while maintaining conversation flow. The new model is significantly more capable than the previous GPT-4o-based voice mode.
# Introducing GPT‑Live
Source: [https://simonwillison.net/2026/Jul/8/introducing-gptlive/](https://simonwillison.net/2026/Jul/8/introducing-gptlive/)
8th July 2026 \- Link Blog
**[Introducing GPT‑Live](https://openai.com/index/introducing-gpt-live/)**\([via](https://news.ycombinator.com/item?id=48834405)\) OpenAI*finally*upgraded the model used by ChatGPT voice mode\!
I've had preview access for a few weeks in the iPhone app, and the new model is very impressive\. It also has the ability to spin off harder tasks to GPT\-5\.5:
> For questions that require web search, deeper reasoning, or more complex work, it delegates to our latest frontier model behind the scenes and brings the result back into the conversation when it’s ready\. While it works, GPT‑Live can keep talking with you and maintain the flow of conversation\. At launch, GPT‑Live will use GPT‑5\.5 in the background\. As we release new frontier models, we’ll continuously update the model used by GPT‑Live\.
The previous voice mode in the ChatGPT app was based on a GPT\-4o era model, with a knowledge cut\-off some time in 2024\. I had mostly stopped using voice mode because the age and relative weakness of the model greatly limited how useful it was as a brainstorming partner\.
During the preview period I encountered a pretty obscure bug: the model was interrupting me to laugh at things I said, which weren't even intended as jokes\! It felt rude and condescending \- I reported it to OpenAI and as far as I can tell they made some tweaks and it's now less likely to happen\.
From looking back at my transcripts I think it was this bit that triggered the interrupting laugh:
> so where are the owls when they're not, like before dusk? The owls exist, right? Are they hiding in holes? Where are they hiding?
My longest conversation with the new model has been a full hour while walking the dog \(and[taking photos of pelicans](https://simonwillison.net/elsewhere/sighting/)\)\. I have not yet managed to take a photo of an owl\.
OpenAI announces GPT-Live, a new full-duplex voice model that enables more natural, real-time conversations by allowing simultaneous listening and speaking, with GPT-5.5 as the backend model.
OpenAI releases GPT-Live-1, an upgraded voice mode for ChatGPT that interrupts less, allows real-time translation, and can generate visual context for topics like weather and sports.
OpenAI released new full-duplex voice models GPT-Live-1 and GPT-Live-1 mini for more natural live conversations, allowing simultaneous speaking and listening, with improvements in turn-taking and context handling, and replacing Advanced Voice Mode in ChatGPT.
ChatGPT's voice mode runs on a weaker GPT-4o era model with an April 2024 knowledge cutoff, significantly older than OpenAI's latest capabilities. The article highlights a growing gap between OpenAI's consumer voice interface and its more advanced paid models, driven by differences in reward signal clarity and B2B market incentives.
OpenAI has fully rolled out GPT-Live, a new generation of voice models for natural human-AI interaction, to ChatGPT users on Go, Plus, and Pro plans, with free user rollout in progress.