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May 2025: OpenAI's new models: which to choose

The article introduces OpenAI's new models, categorized into three groups based on their functionalities: Input/Output, Chain-of-Thought, and Agentic COT, each tailored to specific professional needs. It emphasizes the importance of selecting the appropriate model according to the tasks at hand and highlights the necessity of training teams for effective integration. Finally, it offers support to help businesses identify and implement AI solutions suited to their needs.

Author
Tomorrow Solutions
Published
June 10, 2025
Reading
3 min
May 2025: OpenAI's new models: which to choose

The AI ecosystem is expanding with new OpenAI models. With such diversity, how do you make the right choice for your professional activity?

Three Families of AI for Distinct Needs

The new AI models are divided into three fundamental categories:

  1. Input/Output: like GPT-4o, they provide immediate responses without intermediate steps
  2. Chain-of-Thought: A-series or O1 models build their reasoning step by step
  3. Agentic COT: O3, O4-mini, and O4-mini high combine reflection with concrete actions (coding, web research, image analysis)

These technical differences translate into practical applications for your business.

The Right Model for Every Professional Need

Selecting the appropriate model directly depends on your objective:

  • GPT-4o: ideal for answering frequent customer questions or quickly generating simple content
  • O1: perfect for developing a structured business strategy or planning a project step by step
  • O3: recommended for handling complex tasks requiring multiple coordinated actions
  • O4-mini high: relevant if you work with visual elements or develop interfaces
  • O4-mini: suitable for recurring automations, with controlled costs
  • GPT-4.1: advantageous for analyzing large amounts of data or documenting your expertise

Why Some Experiences with These AIs Are Disappointing

The main mistake is using a model that is too complex for a simple task or vice versa. A conductor (O3/O4) will be ineffective for playing a simple melody, while a soloist (GPT-4o) will fail to coordinate a set of actions.

Satisfied professionals follow these principles:

  • Clearly define their need before choosing a model
  • Test different approaches to find the most effective one
  • Train their teams in the appropriate use of each technology

How to Integrate These Models into Your Business

Are you running a small business or working independently? These new AIs can transform your professional daily life.

But where to start? Training and support are essential to:

  • Assess your specific needs
  • Choose the models suited to your sector
  • Implement optimized workflows
  • Train your team in best practices

Mastering these tools allows you to focus on your core business while AI handles time-consuming tasks.

Take Action Now

Do you want to explore how these new AI models can create value in your business?

Let's take 30 minutes to discuss your specific needs and identify concrete opportunities. This initial discussion is free and without obligation.

Book your slot: https://cal.com/tomorrow-solutions

Together, we will identify which AI models align with your business objectives and how to effectively integrate them into your professional routine.

Continue reading

Other perspectives on enterprise AI adoption

  1. 01

    Microsoft Copilot in Outlook: Transforming an Email Thread into a Plan

    The article explains how Microsoft Copilot in Outlook can transform complex email threads into clear and actionable plans by identifying decisions, actions, responsible parties, deadlines, and risks, rather than merely summarizing the exchanges. This feature enables a shift from mere understanding to execution by structuring information for better coordination and task tracking. The adoption of Copilot for this use case is facilitated by its simplicity, frequent use, and the time savings it provides, all while remaining under human control.

    May 2, 2026
  2. 02

    RTFCE Method: How to Structure Your Microsoft Copilot Prompts

    The article introduces the RTFCE method for effectively structuring prompts used with Microsoft Copilot to enhance the quality of the responses obtained. This method is based on five key elements: Role, Task, Format, Constraints, and Examples, allowing vague requests to be transformed into clear and actionable instructions. By adopting this approach, users can achieve more precise and useful results, thereby facilitating the adoption and integration of Copilot into professional workflows.

    May 2, 2026
  3. 03

    Microsoft Copilot in Outlook: How to Move Beyond Generic Responses

    The article explores the use of Microsoft Copilot in Outlook, emphasizing that to transition from generic responses to truly useful emails, it is crucial to configure Copilot with the user's context, role, and style. It suggests methods for personalizing Copilot, such as analyzing personal writing style and adapting the tone according to situations, while reminding of the importance of human validation and the tool's limitations. In conclusion, when used effectively, Copilot can enhance the quality of communication and save time, but it requires an appropriate framework and method.

    May 2, 2026

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