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OpenAI: GPT-5.5 Pro Release Date

GPT-5.5 Pro was released on 2026-04-23, which was 194 days ago. Its recency score is 91.

Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC

Release date
2026-04-23
Recency score
91

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Frequently asked questions

When was GPT-5.5 Pro released?

GPT-5.5 Pro was released on 2026-04-23, which was 194 days ago. Its recency score is 91.