OpenAI launched its latest AI model, ChatGPT 5, on August 7, 2025, with CEO Sam Altman calling it a PhD-level expert in any topic. Yet, on launch day, the model stumbled on a simple decimal subtraction problem, highlighting that even advanced AI can slip up in basic tasks.
This mistake quickly spread across social media, sparking debates about AI reliability. Users tested the model with the equation 5.9 = x + 5.11, expecting x to be 0.79. ChatGPT 5 first gave -0.21, only correcting itself after a follow-up prompt.
The Hype Around the Launch
OpenAI rolled out ChatGPT 5 amid high expectations, positioning it as a major upgrade from previous versions. The company claims it handles complex reasoning, coding, and problem-solving at expert levels.
Altman compared the jump from GPT-4 to this new model to Apple’s shift to Retina displays. He said it feels like chatting with a true specialist. This launch follows a year of AI advancements, including rivals like Google’s Gemini updates in early 2025, which focused on multimodal features.
The timing aligns with growing AI adoption in everyday life. For instance, schools now use similar tools for tutoring, and businesses rely on them for data analysis. OpenAI’s move aims to stay ahead in this competitive field.
Experts praise the model’s ability to switch to a deeper thinking mode automatically. This feature helps with tough questions, reducing errors by up to 80 percent compared to older models.
The Math Mistake
The error involved a straightforward subtraction. ChatGPT 5 initially subtracted in the wrong order, leading to the incorrect answer.
When prompted again, it fixed the mistake and showed step-by-step work. This shows the AI can recover, but it needs clear guidance.
Many users shared similar tests online. Some reported perfect results on advanced math like calculus, while others found glitches in basic arithmetic.
This incident echoes past AI blunders. Remember when earlier models struggled with counting or simple logic puzzles? ChatGPT 5 improves on those, but perfection remains elusive.
Why AI Still Makes Basic Errors
AI models like ChatGPT 5 do not calculate like traditional computers. They predict answers based on patterns from vast training data.
In this case, the model might have rushed without breaking down the steps. Engineers call these reasoning slips, where the AI mimics human mental shortcuts that sometimes fail.
To avoid such issues, users should ask the AI to explain its process. OpenAI notes that explicit instructions boost accuracy.
Recent studies in 2025 show AI error rates dropping overall. For example, a report from MIT found large language models now handle 90 percent of college-level math correctly when guided.
However, biases in training data can cause unexpected mistakes. Balancing speed and precision remains a key challenge for developers.
Here are some common AI error types:
- Hallucinations: Making up facts that sound real.
- Context slips: Forgetting earlier parts of a conversation.
- Overconfidence: Giving wrong answers without doubt.
Standout Capabilities of GPT-5
ChatGPT 5 shines in areas beyond basic math. It builds full websites or apps from a single prompt, making it a boon for developers.
The model excels at following instructions precisely. OpenAI says it hallucinates 45 percent less than GPT-4o in standard use.
For education, it acts like a personal tutor. Students can get PhD-level explanations on subjects like physics or history.
In business, it analyzes data trends swiftly. A recent case saw it help a startup predict market shifts with high accuracy.
OpenAI tested it on benchmarks. Results show top scores in coding challenges and reasoning tasks.
| Feature | Improvement Over GPT-4 | Example Use |
|---|---|---|
| Reasoning | 80% fewer errors in thinking mode | Solving complex puzzles |
| Coding | Builds apps in one go | Creating a mobile game |
| Accuracy | 45% less hallucinations | Fact-checking reports |
| Speed | Faster responses | Real-time tutoring |
How to Access and Use It
ChatGPT 5 is now available to all users, with rollout completing over a few days. Free users get the regular version, while paid subscribers access advanced options.
OpenAI offers three tiers to fit different needs. This setup ensures wide reach without overwhelming servers.
Pricing starts at free for basics. The Pro version costs 200 dollars per month for unlimited high-power use.
Capacity issues might cause brief waits during peak times. Altman warned of potential hiccups as demand surges.
Tips for best results include:
- Start with clear prompts.
- Ask for step-by-step reasoning.
- Test answers against known facts.
Enterprise and education users gain access next week. This phased approach helps manage the launch smoothly.
The Bigger Picture for AI Users
This math slip reminds us that AI, like humans, benefits from double-checking. It adds a human touch to the tech, showing even experts err.
As AI integrates into daily life, from job searches to creative writing, understanding its limits empowers users. Events like this fuel discussions on AI ethics and regulation, especially after Altman’s recent comments on safety.
What do you think about ChatGPT 5’s potential and pitfalls? Share your experiences in the comments below, and spread the word by sharing this article with friends curious about AI advancements.