ChatGPT Cheat Sheet: Which OpenAI Model Should You Use?

Key Points

1. OpenAI's GPT-5 now offers three thinking modes: Auto, Fast, and Thinking, to improve user experience and address feedback.

2. Users can switch between GPT-5, GPT-4o, GPT-4.1, and other models, each with different strengths and quirks.

3. Initial complaints about GPT-5 included issues with tone, accuracy, and lost capabilities from older models.

4. CEO Sam Altman announced the changes, including increased rate limits (3,000 messages/week for GPT-5 Thinking).

5. OpenAI provides tools like a "GPT Model and Mode Picker" to help users select the best AI model for their needs.