[Definitive Guide] How Work Changes with GPT-5 and Claude | What is the Work Style of the AI Era?

It has been a long time since people started saying that 'the era where AI takes our jobs is coming,' but what is the reality? In 2025, with the arrival of GPT-5 and Claude Opus 4.1, our way of working is beginning to shift significantly, not toward being 'taken away,' but toward 'evolving.'

In this article, we will compare the features of the latest AIs, GPT-5 and Claude, and explain specifically how people in various positions—such as creators, side-hustle beginners, and office workers—can change their work.

The AI Era Work Style: What Changes and How?

There was once an image that 'AI is something used by a few engineers.' However, today, AI is utilized in every aspect of daily work, including writing, brainstorming, document creation, and image generation.

In particular, the emergence of GPT-5 and Claude has dramatically increased the 'ease of use' and 'human-likeness' of AI. We are now in an era where there is a significant difference in both the speed and quality of work between those who master AI and those who do not.

Comparing GPT-5 and Claude | What Can They Do and How Do They Differ?

GPT-5 is an 'all-rounder' capable of handling complex instructions.
On the other hand, Claude is an 'empathetic type' that excels at natural conversation and suggestions that resonate with emotions.

For example, if you are writing a blog post, you can develop the structure with Claude and leave the SEO optimization and summarization to GPT-5. By using both in this way, you can achieve more efficient and human-like output.

Work Techniques Changed by AI | Real-World Use Cases

Case 1: A side-hustling mom mass-produces note articles with GPT-5

A woman in her 40s who started a side hustle on note during childcare breaks. She used GPT-5 to automatically generate outlines and headings, cutting her writing time in half. As a result, she succeeded in earning 30,000 yen per month.

Case 2: An office worker creates presentation materials at high speed with Claude

A man in his 30s who struggled with weekly internal presentations. When he asked Claude to 'create a presentation with a structure that will convince my boss,' a persuasive slide draft was completed instantly. His overtime dropped to zero, and his performance evaluation improved.

Case 3: A designer uses both AIs for brainstorming and image generation

A freelance designer who was stuck for ideas. He organized his concepts with Claude and designed prompts for image generation with GPT-5. He became able to make proposals that resonate with clients in a short amount of time.

What is the 'Human Power' Required in the AI Era?

As AI evolves, what is required of us humans is the 'quality of questions' and 'how to convey emotions.' While AI is good at organizing information and making suggestions, the context and story of 'who to deliver it to and how' remain the role of humans.

In other words, to master AI, you need the ability to think about 'what to ask' and 'how to use it.' GPT-5 and Claude are entities that will enhance the quality of your work as your 'thinking partners.'

Steps to Start Your AI Work Techniques: Things You Can Do Today

1. Start by trying it for free → Start with simple questions on the official ChatGPT or Claude websites.

2. Take stock of how you can use it in your own work → Writing? Brainstorming? Organizing documents? Start by focusing on just one thing.

3. Incorporate it into small habits → Example: "Have AI organize my tasks for the day for 5 minutes every morning."

Summary: AI is not a threat, but your strongest partner

GPT-5 and Claude are not just tools, but "partners" that support your work. Depending on how you use them, your time, your results, and even the way you work will change significantly.

Moving toward an era where we "create work with AI" rather than "having our work taken by AI." Why not take the first step and try it out?