OpenAI said on July 9 at 10 a.m. PT that it would publicly launch its new GPT-5.6 model series, first unveiled in preview on June 26. A day earlier, it began the global rollout of its GPT-Live voice models, pushing its latest models across both text and voice at once.
July 9 · OpenAI
GPT-5.6 Goes Public — and Voice Goes Live, Global, All at Once
OpenAI publicly launches its three-tier GPT-5.6 series after easing government access limits, while next-gen GPT-Live voice models roll out worldwide a day earlier — pushing text and voice to the frontier simultaneously.
3
Tiered GPT-5.6 models: Sol, Terra, Luna
150M+
People said to use ChatGPT Voice
2
Fronts shipped at once — text & voice
The GPT-5.6 Series — Three Tiers
Sol
Flagship
"Strongest model yet" — top-tier reasoning, coding, science & cybersecurity. API & Codex first.
Terra
Everyday
Balanced, general-purpose model for daily use.
Luna
Lower-cost
Fast, lightweight, lower-cost option.
Path to Public Release
From gated preview to global launch in under two weeks.
JUN 26
Preview — access limited to "trusted partners" per U.S. government request
→
EARLY JUL
Government limits eased after national-security & safety reviews
→
JUL 9, 10AM PT
Public launch via API & Codex; ChatGPT integration in stages
GPT-Live · Rolling out July 8
Full-duplex voice — listen and speak at once
New default voice models drop the latency and unnaturalness of turn-based systems, with interruption handling, backchannels and background task delegation. In human evaluations, reportedly beat the earlier Advanced Voice Mode on naturalness, flow and turn-taking.
GPT-Live-1
For paid plans
GPT-Live-1 mini
For free users
Available on iOS · Android · web — backed by the GPT-5.5 line (Instant/Thinking), frontier updates planned.
Welcomed
The three-tier model lineup
Hopes for deeper Codex integration
More natural, low-latency voice
Cautioned
Want faster model additions over livestreams
Questions on language coverage
Early stability of new features
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