GPT-5.5 Just Launched: What Changed and Is It Worth It for Indie Hackers?

Originally published at devtoolpicks.com OpenAI shipped GPT-5.5 on April 23, 2026. The launch tweet hit 6.7 million views and 42,000 likes within hours. The internal codename before launch was "Spud," after the potato emoji OpenAI used to tease the release. The official name is GPT-5.5. Here is what actually changed, what you get on which plan, and whether any of this shifts how you should be thinking about your AI coding setup right now. What is GPT-5.5? GPT-5.5 is OpenAI's new frontier model,