OpenAI has finally cleared up confusion around its different ChatGPT models by posting a new article titled “ChatGPT Enterprise – Models & Limits” on May 3.
Although meant for business users, the guide is also useful for regular ChatGPT users.
Currently, ChatGPT offers five main models: GPT-4o, GPT-4.5, o3, o4-mini, and o4-mini-high. But many users are unsure which one to use and when.
GPT-4o vs GPT-4.5: What’s the Difference?
- GPT-4o is called the “omni model.” It’s designed for real-time tasks like summarizing, writing emails, or brainstorming. It supports most features, including image generation, audio tools, data analysis, and custom GPTs.
- GPT-4.5, on the other hand, is better at creative and emotional tasks, like writing more naturally and thinking creatively. If you want a model with stronger communication skills, GPT-4.5 is the better pick.
o3, o4-mini, and o4-mini-high: Which One Should You Use?
- o4-mini is fast and good for basic technical tasks like coding or STEM-related questions.
- o4-mini-high is more accurate and better at advanced tasks, such as complex math or detailed programming.
- o3 is best for complex, multi-step work like long-term planning, in-depth analysis, or difficult science problems.
To access these models, users need to subscribe to ChatGPT Plus for $20/month.
Bijay Pokharel
Bijay Pokharel is the Founder and Editor-in-Chief of Abijita, an independent technology and cybersecurity news publication established in 2017. A specialist in cybersecurity journalism, Bijay covers vulnerability research, malware analysis, enterprise data breaches, digital privacy, and emerging technologies. His work translates complex technical threats into precise, accessible, and actionable intelligence for security professionals and general readers alike. His reporting and investigative coverage are routinely cited and republished across leading technology and security media.



