OpenAI chief scientist Jakub Pachocki’s internal memo, reported June 11, described GPT-5.6 as a meaningful improvement over the GPT-5.5 model released April 23, shifting trader focus toward late June and supporting the 75% market-implied odds for a June 22–28 release. Codex backend leaks earlier in May and a fast post-GPT-5.5 iteration cadence have reinforced expectations of imminent availability, while the absence of an official announcement or model card keeps the 16% probability on “not released by June 28” alive. Competitive pressure from rivals and the model’s rumored efficiency and context-window gains further anchor sentiment around the coming week as the most likely window.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedNot released by June 28 100.0%
June 1–June 7 <1%
Prior to May 18 <1%
May 18–May 24 <1%
$928,345 Vol.
$928,345 Vol.
Jun 28, 2026
Prior to May 18
No
May 18–May 24
No
May 25–May 31
No
June 1–June 7
No
June 8–June 14
No
June 15–June 21
No
June 22–June 28
No
Not released by June 28
Yes
Not released by June 28 100.0%
June 1–June 7 <1%
Prior to May 18 <1%
May 18–May 24 <1%
$928,345 Vol.
$928,345 Vol.
Jun 28, 2026
Prior to May 18
$3,028 Vol.
No
May 18–May 24
$2,192 Vol.
No
May 25–May 31
$21,919 Vol.
No
June 1–June 7
$15,288 Vol.
No
June 8–June 14
$53,986 Vol.
No
June 15–June 21
$80,844 Vol.
No
June 22–June 28
$421,554 Vol.
No
Not released by June 28
$329,535 Vol.
Yes
This market will resolve according to the calendar date (ET) on which OpenAI's GPT-5.6 model is made available to the general public.
GPT-5.6 refers to a product explicitly named GPT-5.6, or a variant that is recognized as a direct successor to GPT-5.5, similar to the progression from GPT-5.1 to GPT-5.2. (e.g., GPT-5.7, GPT-5.8, etc., would qualify toward this market)
Qualifying releases of task-specialized models (e.g., GPT-Codex/Transcribe), cost-efficiency variants (e.g., Nano/Mini), or reasoning models of the o-series family will count for this market. Products labeled as a new flagship generation GPT-6 or similar will NOT qualify.
A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice.
The release must be either clearly defined and publicly announced by OpenAI as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within the company’s official website. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public will not qualify.
The primary resolution source for this market will be official information from OpenAI, with additional verification from a consensus of credible reporting.OpenAI chief scientist Jakub Pachocki’s internal memo, reported June 11, described GPT-5.6 as a meaningful improvement over the GPT-5.5 model released April 23, shifting trader focus toward late June and supporting the 75% market-implied odds for a June 22–28 release. Codex backend leaks earlier in May and a fast post-GPT-5.5 iteration cadence have reinforced expectations of imminent availability, while the absence of an official announcement or model card keeps the 16% probability on “not released by June 28” alive. Competitive pressure from rivals and the model’s rumored efficiency and context-window gains further anchor sentiment around the coming week as the most likely window.
This market will resolve according to the calendar date (ET) on which OpenAI's GPT-5.6 model is made available to the general public.
GPT-5.6 refers to a product explicitly named GPT-5.6, or a variant that is recognized as a direct successor to GPT-5.5, similar to the progression from GPT-5.1 to GPT-5.2. (e.g., GPT-5.7, GPT-5.8, etc., would qualify toward this market)
Qualifying releases of task-specialized models (e.g., GPT-Codex/Transcribe), cost-efficiency variants (e.g., Nano/Mini), or reasoning models of the o-series family will count for this market. Products labeled as a new flagship generation GPT-6 or similar will NOT qualify.
A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice.
The release must be either clearly defined and publicly announced by OpenAI as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within the company’s official website. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public will not qualify.
The primary resolution source for this market will be official information from OpenAI, with additional verification from a consensus of credible reporting.
GPT-5.6 refers to a product explicitly named GPT-5.6, or a variant that is recognized as a direct successor to GPT-5.5, similar to the progression from GPT-5.1 to GPT-5.2. (e.g., GPT-5.7, GPT-5.8, etc., would qualify toward this market)
Qualifying releases of task-specialized models (e.g., GPT-Codex/Transcribe), cost-efficiency variants (e.g., Nano/Mini), or reasoning models of the o-series family will count for this market. Products labeled as a new flagship generation GPT-6 or similar will NOT qualify.
A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice.
The release must be either clearly defined and publicly announced by OpenAI as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within the company’s official website. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public will not qualify.
The primary resolution source for this market will be official information from OpenAI, with additional verification from a consensus of credible reporting.
Market Opened: May 15, 2026, 6:49 PM ET
Volume
$928,345End Date
Jun 28, 2026Market Opened
May 15, 2026, 6:49 PM ETResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve according to the calendar date (ET) on which OpenAI's GPT-5.6 model is made available to the general public.
GPT-5.6 refers to a product explicitly named GPT-5.6, or a variant that is recognized as a direct successor to GPT-5.5, similar to the progression from GPT-5.1 to GPT-5.2. (e.g., GPT-5.7, GPT-5.8, etc., would qualify toward this market)
Qualifying releases of task-specialized models (e.g., GPT-Codex/Transcribe), cost-efficiency variants (e.g., Nano/Mini), or reasoning models of the o-series family will count for this market. Products labeled as a new flagship generation GPT-6 or similar will NOT qualify.
A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice.
The release must be either clearly defined and publicly announced by OpenAI as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within the company’s official website. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public will not qualify.
The primary resolution source for this market will be official information from OpenAI, with additional verification from a consensus of credible reporting.OpenAI chief scientist Jakub Pachocki’s internal memo, reported June 11, described GPT-5.6 as a meaningful improvement over the GPT-5.5 model released April 23, shifting trader focus toward late June and supporting the 75% market-implied odds for a June 22–28 release. Codex backend leaks earlier in May and a fast post-GPT-5.5 iteration cadence have reinforced expectations of imminent availability, while the absence of an official announcement or model card keeps the 16% probability on “not released by June 28” alive. Competitive pressure from rivals and the model’s rumored efficiency and context-window gains further anchor sentiment around the coming week as the most likely window.
This market will resolve according to the calendar date (ET) on which OpenAI's GPT-5.6 model is made available to the general public.
GPT-5.6 refers to a product explicitly named GPT-5.6, or a variant that is recognized as a direct successor to GPT-5.5, similar to the progression from GPT-5.1 to GPT-5.2. (e.g., GPT-5.7, GPT-5.8, etc., would qualify toward this market)
Qualifying releases of task-specialized models (e.g., GPT-Codex/Transcribe), cost-efficiency variants (e.g., Nano/Mini), or reasoning models of the o-series family will count for this market. Products labeled as a new flagship generation GPT-6 or similar will NOT qualify.
A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice.
The release must be either clearly defined and publicly announced by OpenAI as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within the company’s official website. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public will not qualify.
The primary resolution source for this market will be official information from OpenAI, with additional verification from a consensus of credible reporting.
GPT-5.6 refers to a product explicitly named GPT-5.6, or a variant that is recognized as a direct successor to GPT-5.5, similar to the progression from GPT-5.1 to GPT-5.2. (e.g., GPT-5.7, GPT-5.8, etc., would qualify toward this market)
Qualifying releases of task-specialized models (e.g., GPT-Codex/Transcribe), cost-efficiency variants (e.g., Nano/Mini), or reasoning models of the o-series family will count for this market. Products labeled as a new flagship generation GPT-6 or similar will NOT qualify.
A qualifying model must be launched and publicly accessible, including via open beta or open rolling waitlist signups. A closed beta or any form of private access will not suffice.
The release must be either clearly defined and publicly announced by OpenAI as being accessible to the general public or otherwise made publicly accessible and explicitly labeled within the company’s official website. Labeling errors, placeholder text, or version names displayed on the website that do not correspond to a model that is actually accessible to the general public will not qualify.
The primary resolution source for this market will be official information from OpenAI, with additional verification from a consensus of credible reporting.
Volume
$928,345End Date
Jun 28, 2026Market Opened
May 15, 2026, 6:49 PM ETResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
OpenAI chief scientist Jakub Pachocki’s internal memo, reported June 11, described GPT-5.6 as a meaningful improvement over the GPT-5.5 model released April 23, shifting trader focus toward late June and supporting the 75% market-implied odds for a June 22–28 release. Codex backend leaks earlier in May and a fast post-GPT-5.5 iteration cadence have reinforced expectations of imminent availability, while the absence of an official announcement or model card keeps the 16% probability on “not released by June 28” alive. Competitive pressure from rivals and the model’s rumored efficiency and context-window gains further anchor sentiment around the coming week as the most likely window.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions