ChatGPT in 2025: Key Features to Master

1/ Choose the right ChatGPT model:

• o3 (paid): for in-depth analysis and synthesis.

• 4.5 (paid): ideal for writing emails and content with a human tone.

• 4o (free): fast, useful for simple Google-like questions.

Use o3 for 80% of your analysis, 4o for "Google-like" responses, and 4.5 for emails and articles with a more human tone. Explanatory video:

2/ Upgrade to Plus plan and prioritize the O3 model

The €20 per month subscription gives you access to the o3 model (with reasoning) and 4.5 (natural writing).

3/ Leverage "Deep Research" for your market monitoring

Launch a Deep Research on your market/competitors, attach your site or internal files for context. Let it run (3–20 min), then ask O3: "Create a summary table for me."

Check the sources cited at the end. The latest models have fewer hallucinations and better reliability by notably citing their sources.

4/ Organize your conversations easily

Create folders ("projects") to save your useful exchanges. Then use Canvas mode to edit your texts directly in ChatGPT without having to copy-paste elsewhere.

5/ Get instant advice on your mobile

From the ChatGPT app, activate the camera and show your screen or a document. ChatGPT understands the context and helps you directly, like a colleague available at any time.

By adopting these 5 simple habits, you'll already be using ChatGPT better than most professionals.