When will GPT-5.6 be released?

Resolution Criteria

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.

Prediction market trading on the release date of GPT-5.6 is heavily concentrated on the first three weeks of June 2026, with the June 1–7 window the heaviest-backed single outcome. A substantial share of volume is also split across June 8–14 and June 15–21, while a notable portion backs the possibility that no qualifying release occurs before the 28 June 2026 deadline. The market resolves on the calendar date (ET) on which OpenAI makes a qualifying model publicly accessible.

Market structure

The market offers eight date-range outcomes spanning from mid-May to late June 2026, plus a 'Not released by June 28' outcome. Volume is heavily concentrated on early-to-mid June, with a meaningful tail on non-release. Resolution requires a publicly accessible launch — open beta or open rolling waitlist counts — explicitly identified by OpenAI as available to the general public, or confirmed accessible via OpenAI's official website. The primary resolution source is official OpenAI communications, supplemented by credible press consensus.

Background

OpenAI has followed an incremental versioning pattern since GPT-4, releasing a series of point upgrades — GPT-4o, GPT-4.5, GPT-5 — alongside specialised and efficiency variants. The company has accelerated its release cadence through 2024 and into 2025, with model announcements often timed to developer events and quarterly product cycles. GPT-5.6, under the resolution criteria, would encompass any direct successor to GPT-5.5 made publicly accessible — including task-specialised variants such as coding or transcription models — but explicitly excludes the next flagship generation GPT-6. The market therefore captures a relatively narrow but plausible release window in mid-2026, during which OpenAI would need to publish a named successor that clears the public accessibility threshold.

Key factors

Several structural factors govern how this market resolves. First, OpenAI's internal versioning decisions determine whether any release is explicitly branded GPT-5.6 or an equivalent successor; rebranding to a non-numeric scheme or skipping directly to GPT-6 would direct volume towards 'Not released by June 28.' Second, the resolution criteria admit task-specialised variants — a GPT-Codex or transcription model in the 5.x lineage would qualify — meaning the market could resolve on a narrower product launch rather than a flagship update. Third, public accessibility is a hard threshold: a closed beta or invite-only rollout does not resolve the market, so phased releases that remain gated past 28 June would count as non-resolution. Fourth, OpenAI's developer conference schedule and competitive dynamics with other frontier AI labs can influence announcement timing. Fifth, any regulatory review or safety evaluation process that delays public deployment would push resolution towards later windows or the non-release outcome.

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