GPT 5.5
Definition
GPT-5.5 is an advanced, unreleased large language model developed by OpenAI, part of the Generative Pre-trained Transformer (GPT) series, following GPT-5. It has been referenced in leaks as 'Spud' and is expected to offer superior reasoning, coding efficiency, and multimodal capabilities.
Internally tested and A/B trialed in tools like ChatGPT, GPT-5.5 promises faster performance and better token efficiency, positioning it as OpenAI's next frontier model slated for potential Q2 2026 release.
Examples
I asked GPT 5.5 to plan my vacation, and it booked me a one-way ticket to productivity nirvana.
GPT 5.5 is so advanced, it solved my existential crisis by suggesting I just reboot my life.
My boss thought GPT 5.5 wrote the quarterly report—turns out it did, while roasting our coffee machine.
With GPT 5.5 handling small talk, my dates now end with profound insights instead of awkward silences.