OpenAI’s next GPT model may be closer than expected, but the company has not officially announced GPT-5.6 yet.
Recent prediction market activity has pointed to a possible GPT-5.6 release within the coming weeks. Polymarket’s market for GPT-5.6 defines the outcome as the date when OpenAI makes the model available to the general public.
No Official Confirmation Yet
OpenAI has not listed GPT-5.6 in its official model release notes. The latest listed update is for GPT-5.5 Instant, which OpenAI updated on May 28 to improve response style and quality.
OpenAI introduced GPT-5.5 in April, calling it its smartest and most intuitive model at the time. The company later made GPT-5.5 and GPT-5.5 Pro available in the API.
June or July Launch
Polymarket’s technology markets recently showed strong odds for GPT-5.6 arriving by June 30 or July 31. These odds are not an official release schedule, but they show that traders expect OpenAI to release a direct successor to GPT-5.5 soon.
The market rules say GPT-5.6 would need to be a product explicitly named GPT-5.6 or a clearly recognized successor to GPT-5.5.
Leak Reports Mention Codex Logs
Separate reports have claimed that GPT-5.6 appeared in OpenAI Codex-related logs. One report said a routing entry in Codex rollout logs pointed to GPT-5.6, suggesting the model may already be in testing.
Another report claimed GPT-5.6 is internally linked to the codename “iris-alpha” and may include a 1.5 million token context window. However, these details have not been confirmed by OpenAI.
What to Expect
If OpenAI does release GPT-5.6 soon, it would likely follow the company’s recent pattern of faster GPT-5 series updates. GPT-5.5 improved professional work, coding, tool use, and reasoning compared with GPT-5.4, so expectations for GPT-5.6 are focused on further gains in those areas.
For now, GPT-5.6 remains an expected but unconfirmed model. The strongest public signals are coming from prediction markets and leak reports, not from OpenAI itself
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