Resolution criteria

This market will resolve to "Yes" if OpenAI releases a model explicitly named "GPT-5.5" on or before September 30, 2025. The release date will be determined based on official announcements from OpenAI's website or verified press releases. If no such model is released by the specified date, the market will resolve to "No."

Background

As of August 7, 2025, OpenAI has released several models in the GPT-4 series, including GPT-4.5 in February 2025 and GPT-4.1 in April 2025. (en.wikipedia.org) Reports indicate that OpenAI is preparing to launch GPT-5 as early as August 2025. (reuters.com) However, there has been no official mention of a model named "GPT-5.5."

Considerations

OpenAI's model naming conventions have varied, with releases like GPT-4.5 and GPT-4.1. The absence of a "GPT-5.5" in official communications suggests that such a model may not be planned. Traders should consider OpenAI's historical release patterns and the possibility that the company may skip directly from GPT-5 to a subsequent major version without an intermediate "5.5" release.