GPT-5.6 released by July 13, 2026?

Prediction markets put the probability at 66%: GPT-5.6 released by July 13, 2026. Currently, markets are divided (66% YES, 34% NO).

What’s Happening

OpenAI previewed GPT-5.6 Sol on June 26, 2026, the first release in a new flagship lineup the company describes as its "most capable model yet for cybersecurity." According to reporting, the GPT-5.6 series introduces three tier-based systems named Sol, Terra, and Luna, with Sol positioned as the top cybersecurity tier. OpenAI said Sol matches competing systems such as Mythos Preview while using only a third of the output tokens. Access to the preview was restricted to a small group of vetted partners at the request of the US government, a phased rollout the company framed as a temporary measure while it collects safety data. The question of whether a broader model is gpt-5.6 released by july 13 hinges on whether OpenAI converts this limited preview into general availability. [SecurityWeek, Jun 29]

The launch lands amid intensifying competition among foundation-model labs racing to ship agentic capabilities. On June 30, 2026, Anthropic released Claude Sonnet 5, a more agentic version of its midsize model that it said can "make plans, use tools like browsers and terminals, and run autonomously." Coverage of that release noted that GPT-5.6 Sol had launched in preview the prior week and is also OpenAI's "most agentic model yet." Whether the full series is gpt-5.6 released by july 13 depends partly on this competitive cadence, as rival launches pressure OpenAI to widen availability. [TechCrunch, Jun 30]

The government-linked access constraints add uncertainty to the timeline. The Trump administration previously shut down access to Anthropic's Mythos 5 before permitting a limited re-release to government-approved organizations, and analysts note that a range of AI security tools already rival the ability of Mythos and GPT-5.6 to find and exploit critical zero-day vulnerabilities. For the market resolving on whether gpt-5.6 released by july 13 is met, the key variable is whether OpenAI lifts its vetted-partner restriction into a public launch within the window, or keeps the Sol preview gated pending regulatory sign-off. [Axios, Jun 30]

Traded on Polymarket — $53K Volume

Lower-volume market on Polymarket ($53K). Wider spreads expected — enter with limit orders and be aware of slippage risk. Currently 66c YES.