ChatGPT Available Models: All Supported Models, Version Differences, Capabilities Comparison, And Access Requirements
Summary
A detailed comparison of ChatGPT models, including the GPT-5.2 family, legacy GPT-4 variants, and o-series reasoning models, outlining their capabilities, access tiers, and performance tradeoffs.
Key quotes
The current ChatGPT lineup centers on the GPT-5.2 family, presented in selectable modes that allow users to prioritize speed, depth, or research-grade performance.
The o-series models are engineered specifically for advanced reasoning, featuring extra-large context windows and high output limits for extended problem solving.
The article provides a comprehensive breakdown of the ChatGPT model portfolio as of early 2026. It details the specific use cases, context windows, and subscription requirements for various model versions.