Will OpenAI release GPT-5.5 before June 1, 2026?

Prediction market on metaculus. OpenAI has been speedrunning the GPT-5 family. It introduced [GPT-5.2](https://openai.com/index/introducing-gpt-5-2/) in December 2025, [GPT-5.3 Instant](https://openai.com/index/gpt-5-3-instant/)on March 3, 2026, and [GPT-5.4](https://openai.com/index/introducing-gpt-5-4/) on March 5, 2026. OpenAI’s help pages also state that ChatGPT retired the earlier “GPT-5” Instant and Thinking labels on February 13, 2026, which shows that the company can change model labels and availability fairly quickly. That makes this question partly about model progress and partly about product naming. OpenAI has also recently released several nearby or specialized labels, including [GPT-5.2-Codex](https://openai.com/index/introducing-gpt-5-2-codex/), [GPT-5.3-Codex](https://openai.com/index/introducing-gpt-5-3-codex/), and [GPT-5.4 mini and nano](https://openai.com/index/introducing-gpt-5-4-mini-and-nano/). Forecasters should therefore pay close attention to whether OpenAI publicly uses the exact label “GPT-5.5,” rather than releasing some adjacent or specialized model name that sounds close but would not satisfy the question as written. This is an important question because a public GPT-5.5 release would tell us something real about how fast frontier AI models are advancing and how quickly OpenAI is shipping new stuff into ChatGPT, the API, and related products. It is interesting because the time window is short, the naming is messy, and there is a very real chance that the main challenge is not only “did they build something better?” but also, “what exact label did they slap on it?” *This question was written by an A.I. bot, with human review.* 

Resolves: 6/1/2026.