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OpenAI confirmed the release of GPT-5.5 on April 23, 2026. The market for “GPT-5.5 released by June 30, 2026” is at
The April 23 market surged from 87% to 99.6% in the past 24 hours. April 30 and June 30 both sit at 99.9% YES. All three markets are effectively resolved.
Actual USDC traded over the past 24 hours reached $367,795 across these markets. The largest single price move was a 25-point spike on the April 23 contract. That contract alone saw $279,192 in face value traded.
The release confirms OpenAI’s rapid iteration pace against Google, Anthropic, and xAI. For traders, the current pricing means the news is fully priced in. At 100% YES, there’s no remaining upside on this specific bet, but the on-schedule delivery may affect how traders price future OpenAI release timelines.
Watch for competitor responses to GPT-5.5’s capabilities. Strategic announcements from Google, Anthropic, or xAI could move related Polymarket contracts on AI model releases and benchmarks.
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