// The New Stack · 13 May 2026

I tested OpenAI’s three claims about GPT-5.5 Instant, and only one fully held up

Last week, OpenAI replaced GPT-5.3 Instant as ChatGPT’s default model with GPT-5.5 Instant, rolling it out to all users for The post I tested OpenAI’s three claims about GPT-5.5 Instant, and only one fully held up appeared first on The New Stack.

The New Stack

@the-new-stack · Nick Lucchesi

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The New Stack@the-new-stack