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ChatGPT is OpenAI's conversational AI assistant, powered by the GPT-4 model. Launched in November 2022, it revolutionized public access to AI and popularized the use of conversational AI assistants.
GPT-5: The new generation (August 2025)
GPT-5 has become ChatGPT's default model, replacing GPT-4o, o3, o4-mini and GPT-4.5 for all signed-in users.
Key features of GPT-5
- Automatic reasoning: Applies deeper thinking when the answer requires it
- Fewer hallucinations: OpenAI's most reliable model to date
- Coding excellence: 74.9% on SWE-bench Verified (vs. 69.1% for o3, 30.8% for GPT-4o)
- Response modes: Auto, Fast and Thinking (deep reasoning)
How ChatGPT cites brands
Without browsing: GPT-5 relies on its training data. Brands present in web corpora can appear naturally.
With browsing (Browse): ChatGPT searches Bing in real time. Visibility on Bing then becomes critical.
ChatGPT versions in 2025
| Version | Model | Features |
|---|---|---|
| Free | GPT-5, then GPT-5 mini (after quota) | Volume-limited access |
| Plus | Unlimited GPT-5 + legacy models | Web browsing, file analysis, Custom GPTs |
| Pro | GPT-5 Pro + priority access | Maximum capabilities, extended context |
| Team/Enterprise | All models + GPT-4o, GPT-4.1, o3 | Privacy, advanced Custom GPTs |
Legacy models still available
Paid subscribers retain access to GPT-4o, GPT-4.1 (coding-specialized) and o3 via the model selector.
Note: GPT-4 (original) was retired on April 30, 2025, replaced by GPT-4o.
Improving your visibility on ChatGPT
Target Bing: ChatGPT uses Bing for web browsing. Use Bing Webmaster Tools.
Be on Wikipedia: Wikipedia data is strongly represented in training.
Create citable content: Statistics, studies, clear and structured definitions.
Strengthen E-E-A-T: Authority and expertise are valued by GPT models.
Every question asked to ChatGPT without your name in the answer is a competitor recommended instead of you — measured across 6,820 real AI answers.