---
title: "Discussion on \"GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere\" | Hashnode"
description: "Discussion on \"GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere\". GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere\nOpenAI announced GPT-5.5 on April 23, 2026. The API followed one day later on April 24. We're now four days post-launch — far enough to see what holds up, close enough that third-party repr..."
url: "https://hashnode.com/posts/gpt-55-day-4-analysis-sota-verified-but-not-1-everywhere/69eeb11495af72b981a01299"
---

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# [GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere](https://sangrok.hashnode.dev/gpt-55-day-4-analysis-sota-verified-but-not-1-everywhere?utm_source=hashnode&utm_medium=feed)

GPT-5.5 Day 4 Analysis: SOTA Verified, But Not #1 Everywhere OpenAI announced GPT-5.5 on April 23, 2026. The API followed one day later on April 24. We're now four days post-launch — far enough to see what holds up, close enough that third-party repr...

Apr 27 · 6 min read · sangrok.hashnode.dev  
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