OpenAI’s chief scientist Jakub Pachocki recently described GPT-5.6 internally as a “meaningful improvement” over the current GPT-5.5 flagship, fueling speculation of a late-June public release. Leaks in Codex traces and internal codenames have surfaced alongside reports of a 1.5-million-token context window aimed at complex codebases. Traders on prediction markets have placed over $960,000 in volume, assigning roughly 83% implied probability to a June 22–28 window amid competitive pressure from Anthropic’s Opus 4.8 and Chinese models like GLM-5.2 that have posted stronger benchmark results. OpenAI’s planned IPO filing adds urgency to maintain frontier positioning, though no official model card, benchmarks, or announcement has appeared as of June 18. Any slippage in testing or last-minute safety reviews could shift the timeline into July.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$4,264,559 Vol.
May 15
No
May 22
No
May 31
No
June 5
No
June 8
No
June 15
No
June 23
No
June 26
No
June 30
No
July 3
No
July 6
No
July 7
No
July 8
No
July 9
Yes
July 10
Yes
July 13
Yes
July 15
Yes
July 17
Yes
July 24
Yes
July 31
Yes
$4,264,559 Vol.
May 15
No
May 22
No
May 31
No
June 5
No
June 8
No
June 15
No
June 23
No
June 26
No
June 30
No
July 3
No
July 6
No
July 7
No
July 8
No
July 9
Yes
July 10
Yes
July 13
Yes
July 15
Yes
July 17
Yes
July 24
Yes
July 31
Yes
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 a "Yes" resolution to 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.
For this market to resolve to "Yes," 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 1, 2026, 8:52 AM ET
Resolver
0x65070BE91...Outcome proposed: No
No dispute
Final outcome: No
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 a "Yes" resolution to 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.
For this market to resolve to "Yes," 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.
Resolver
0x65070BE91...Outcome proposed: No
No dispute
Final outcome: No
OpenAI’s chief scientist Jakub Pachocki recently described GPT-5.6 internally as a “meaningful improvement” over the current GPT-5.5 flagship, fueling speculation of a late-June public release. Leaks in Codex traces and internal codenames have surfaced alongside reports of a 1.5-million-token context window aimed at complex codebases. Traders on prediction markets have placed over $960,000 in volume, assigning roughly 83% implied probability to a June 22–28 window amid competitive pressure from Anthropic’s Opus 4.8 and Chinese models like GLM-5.2 that have posted stronger benchmark results. OpenAI’s planned IPO filing adds urgency to maintain frontier positioning, though no official model card, benchmarks, or announcement has appeared as of June 18. Any slippage in testing or last-minute safety reviews could shift the timeline into July.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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