OpenAI clarifies ChatGPT model selection with new guide for users and enterprises

OpenAI has taken a step toward making its expanding portfolio of ChatGPT models more accessible to users by publishing a detailed guide explaining when to use each model.

While the document, posted on May 3 under the title “ChatGPT Enterprise – Models & Limits,” is intended for enterprise customers, its recommendations are also applicable to everyday users of ChatGPT Plus.

Currently, ChatGPT Plus subscribers can access five distinct models: GPT-4o, GPT-4.5, o3, o4-mini, and o4-mini-high. The document offers much-needed clarity on how each model performs in different scenarios, a move likely to help users get more out of their $20 monthly subscription.

GPT-4o vs. GPT-4.5: Real-Time vs. Creative Depth

OpenAI’s newly introduced GPT-4o, dubbed the “omni model,” is a versatile tool capable of handling a wide range of tasks, thanks to its multimodal nature. It excels at real-time applications such as content summarization, idea generation, and email drafting. The model supports a broad feature set, including custom GPTs, image generation, canvas interaction, voice input, and data analysis.

Meanwhile, GPT-4.5 is being positioned as the model of choice for users seeking a more nuanced and emotionally intelligent chatbot. OpenAI describes GPT-4.5 as the superior option for creativity, offering enhanced communication and more human-like brainstorming sessions. While similar in capability to GPT-4o, GPT-4.5 edges ahead when subtlety and imagination are needed.

Choosing the Right “Mini” or Reasoning Model: o3, o4-mini, o4-mini-high

For users focused on technical or analytical tasks, OpenAI also offers three “reasoning” models: o4-mini, o4-mini-high, and o3.

o4-mini is designed for speed and efficiency, making it the ideal choice for simple STEM queries, quick programming tasks, and basic visual reasoning.

o4-mini-high offers improved accuracy and is better suited for advanced coding, mathematics, and scientific explanations.

o3 is geared toward handling complex, multi-step problems such as strategic planning, extensive coding projects, and in-depth analysis.

While these models are part of the ChatGPT Plus tier, they are not yet accessible to free-tier users.

As OpenAI continues to roll out new models and features, the lack of clear public guidance had become a growing pain point for users. This new documentation marks a notable shift in transparency, offering practical advice for tailoring the AI experience to individual needs.

For users still navigating the growing suite of ChatGPT options, this guide provides something increasingly rare in tech: clarity.