Microsoft accidentally confirms GPT-5, GPT-5-Mini, GPT-5-Nano ahead of launch

OpenAI is hosting a live stream at 10AM PT to announce GPT-5, but Microsoft has already confirmed the details.

In a GitHub document, which has now been taken offline, Microsoft confirmed GPT-5 is launching later today. While it was obvious, this is the first official confirmation.

Microsoft also offered more details on GPT-5 models, including the base model, which is called just GPT-5. It is designed for logic and multi-step tasks.

We also have GPT-5-mini, which is a lightweight version for cost-sensitive applications. Then, we have GPT-5-nano, which is optimised for speed and ideal for applications requiring low latency.

Finally, there’s a new GPT-5 chat, which is designed for advanced, natural, multimodal, and context-aware conversations for enterprise applications.

As spotted on Internet Archive, GitHub blog says GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience.

Microsoft added that GPT-5 handles complex coding tasks with minimal prompting, provides clear explanations.

“GPT-5 introduces enhanced agentic capabilities, making it a powerful coding collaborator and intelligent assistant for all users,” Microsoft noted.

OpenAI may limit GPT-5 advanced features to pricey plans

OpenAI plans to ship GPT-5 for free, but if you pay for $20 Plus plan, you’ll get GPT-5 with advanced reasoning, and those with $200 Pro plan will get ‘pro reasoning.’ This is according to documents seen by BleepingComputer.

BleepingComputer previously reported that GPT-5 can automatically sync between reasoning and non-reasoning, but you can insist it to ‘reason’ or think harder to activate reasoning by default