GPT-5.4
On March 5, 2026, OpenAI unveiled GPT-5.4, marking the third major update to the GPT-5 foundation since its original release […]
Model
GPT-5
This comprehensive handbook provides an in-depth exploration of GPT-5, the groundbreaking language model released by OpenAI in early 2025. GPT-5
GPT-5.1
This comprehensive handbook provides an in-depth exploration of GPT-5.1, released by OpenAI in November 2025 as a significant advancement in
GPT-5.2
This handbook provides a comprehensive and in-depth exploration of the GPT-5.2 series of models, released by OpenAI in December 2025.