CORPORATE AMERICA BEHIND THE WALLS OF EA PROMPT ENGINEERING understand the ChatGPT models EA NS GHTS I I Understanding which model you're working with matters when you're building workflows, creating visuals, or drafting communications that need to land with clarity. Each model has different strengths, and choosing the right one helps you prompt smarter, faster, and with better results. ChatGPT is built on tokens that are chunks of text, a word, space or punctuation. These are what the model uses to understand and generate language. When you write a prompt, ChatGPT breaks it into tokens so it can process the information. One token is about three quarters of a word on average. For example: “Create a quarterly operations review deck” equals to about six to seven tokens. For the latest model information refer to the ChatGPT guide as this information will continue to change as OpenAI improves the capabilities.
GPT Models at a Glance
Main model GPT-5: Best all-around model, super smart GPT-5 mini / nano / chat: Smaller, faster, cheaper versions Thinking Models [Reasoning] o1 series: Solves puzzles, logic, math o3 series: Strong problem-solver, harder tasks o4-mini / high: Fast thinker, can also look at pictures Creative Model GPT-4.5: Best for writing, stories, and natural tone Big Memory Models GPT-4.1: Handles huge amounts of info at once GPT-4.1 mini: Same but smaller and faster Talking & Picture Models GPT-4o: Chats with voice and sees pictures GPT-4o mini: Quicker, lighter version for fast chats
Quick Pick GPT-5: almost anything o-models: deep thinking GPT-4.5: creative writing GPT-4.1: long documents GPT-4o: voice or picture chat
These models are available across ChatGPT’s free, plus, and pro subscription tiers. Each tier unlocks different models and capabilities based on the user level of access.
*In the ChatGPT interface, the model selector is located at the top left of the screen, under the ChatGPT logo [on desktop] or in the menu button on mobile.
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