GPT-5 is released! See what's changing in ChatGPT

O GPT-5, launched this Thursday, is the first “unified” artificial intelligence model of OpenAI, combining the reasoning abilities of more complex models with the rapid responses of simpler models. It will also perform tasks for the user, like an AI agent. Here's what's new:

Faster. Smarter. More powerful.

Enquanto or GPT-4 allowed chatbots like ChatGPT offer intelligent answers to a wide variety of questions, the GPT-5 enables the ChatGPT to perform tasks on users' behalf—such as generating software applications, managing a user's schedule, or creating research summaries. Sam Altman explained that "Using GPT-5 is like speaking to a university professor, an expert on any subject, receiving comprehensive information. "

“Using GPT-5 is like speaking to a university professor, an expert on any subject, receiving complete information.”

Sam Altman, CEO of OpenAI.

The new model can also decide on its own how to provide the best response to the user, understanding when a question can be answered immediately or whether it needs to use the AI's reasoning capabilities to think about the topic and respond in a more complex way.

This meant that, until the GPT-4, users had to choose between faster, but less responsive, models or more capable, but slower models. This changes with the GPT-5, which will choose the best model for each type of task.”Content will feel less like AI and more like a friend who knows how to write well..”, says one of the company’s developers.

According to Altman, the GPT-5 represents a “significant step” in the company’s journey toward creating AI capable of outperforming humans in most economically valuable jobs — in other words, toward artificial general intelligence (AGI).

This is “the best model in the world,” he says, explaining that the GPT-5 surpasses cutting-edge models Anthropic, Google DeepMind and xAI (Elon Musk's company) in important tests.

GPT-5 significantly improves health and creativity

No HealthBench Hard Hallucinations — system that measures hallucinations in health topics — the GPT-5 with reasoning, it only “hallucinates” 1,6% of the time, compared to 12,9% for GPT-4o and 15,8% for o3. Although AI chatbots are not healthcare professionals, millions use them for medical advice. Therefore, GPT-5 is now more proactive in alerting you to potential problems and helping you interpret medical results.

A OpenAI also claims that the GPT-5 outperforms other models in subjective areas such as creative writing and design. Turley stated that the GPT-5 responds more naturally and has “better taste” than other models in creative tasks.

Fewer hallucinations and more security

Compared to previous models, the GPT-5 is more accurate and less likely to make up information. While the GPT-4o and o3 had hallucination rates of 20,6% and 22%, the GPT-5 with reasoning reduced this to 4,8%.

According to Alex Beutel, security leader at OpenAI, GPT-5 It's also less likely to cheat or deceive, improving user confidence. It's also more effective at identifying malicious users, rejecting dangerous questions and allowing safe ones.

More natural voice

O Voice mode, available in 2024 and that has been one of the resources of the ChatGPT The most widely used feature since then, it's now available to free plan users "for a few more hours," and unlimited access to paid plan subscribers. The new language model means the AI's voice now has an even more natural intonation, which can be useful for a variety of tasks.

During today's online event, one of the experts used voice mode to practice Korean at different speeds, allowing him to practice according to his learning level.

New features

• Customize the theme: It will be possible to choose the colors of chatGPT, with different themes.
• 4 new personalities: You can choose different personalities, making chatGPT more cynical, robotic, thoughtful, or nerdy. The choice changes the style of responses.
• Integration with Gmail and Google Calendar: Starting next week, paid plan users will be able to integrate Gmail and Google Calendar to see what's most pending and also receive routine organization tips, such as finding free time to do some physical activity.

Price and availability

As of this Thursday (07), the GPT-5 will be available as a default template for all users, including the free plan. ChatGPT. The difference is in the total number of accesses or hours of use available. 

The vice president of ChatGPT, Nick Turley, explained that immediate free access is part of the company's effort to universalize the platform's use. Previously, newer or more powerful models were only available for a fee. See the usage and capacity limitations for each plan:

• Free users have access to GPT-5 with limitations.
• Plan subscribers Plus ($20/month) have higher limits.
• Plan subscribers Pro ($200/month) have unlimited access to GPT-5 and GPT-5 Pro, more powerful version.
• Organizations with Team, Edu, and Enterprise plans will have GPT-5 as their default model starting next week.

While the free plan offers more limited usage, capped at 5 hours, the Plus plan significantly expands this capacity over a shorter period of time and grants weekly access to a dedicated model called "GPT-5-Thinking," which can only be used once per day in the free version. Both plans revert to the "mini" version of the model when their respective limits are reached. For ease of comparison, the table below summarizes the main differences:

A Microsoft also announced the integration of the language model GPT-5, OpenAI, across its product range, spanning consumers, developers, and businesses. This initiative aims to democratize access to artificial intelligence, transforming the way users interact with technology in their daily lives.

The implementation of this new technology will extend for the entire Microsoft ecosystem, including the search engine Bing, edge browser, Microsoft 365 and development platforms such as GitHub Copilot.

For businesses, integration with cloud services Azure OpenAI Service will enable the creation of cutting-edge, custom AI applications and solutions. This strategy reinforces Microsoft's commitment to leading innovation in artificial intelligence, offering more powerful and accessible tools to boost productivity and creativity across all industries.

GPT-5 is one of the most anticipated releases of OpenAI since the ChatGPT gained notoriety in 2022. Currently, the tool is used by more than 700 million users per week — almost 10% of the world's population, according to the company.

What do you think of the new language model? ChatGPT? tell us Comment!

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Text revised by Alexandre Marques in 07 / 08 / 2025.

Source: GPT-5 at OpenAI, OpenAI model comparison, TechCrunch e Microsoft