Unexpected Leak of GPT-5 Details: Four Versions Each Have Their Strengths, but Improvements May Fall Short of Expectations

An accidentally leaked blog post on GitHub has revealed key information about OpenAI's next-generation main model, GPT-5. This document, first discovered by a Reddit user and later reported by The Verge, offers the first official glimpse into the features of GPT-5.

Four Versions to Cover All Scenarios

According to the leaked document, GPT-5 will launch four targeted versions: GPT-5 is focused on logic and multi-step tasks; GPT-5-mini provides a lightweight solution for cost-sensitive scenarios; GPT-5-Nano focuses on speed and low-latency applications; and GPT-5-Chat is specifically designed for enterprise environments, supporting advanced multimodal and context-aware conversations.

GitHub positioned GPT-5 as OpenAI's "most advanced model" in the document, emphasizing significant improvements in reasoning, code generation, and overall user experience. The new model claims to "complete complex coding tasks with minimal prompts" and introduces "enhanced agent capabilities," allowing it to function as a more autonomous intelligent assistant.

Significant Improvements but Limited Gains

However, a recent report from The Information cast cold water on the actual performance of GPT-5. Internal tests showed that although the model has indeed improved in mathematics, coding, and instruction execution, the performance gains are far less than the leap users experienced when moving from GPT-3 to GPT-4.

OpenAI's previous GPT-5 candidate version—called the large language model "Orion"—was eventually released as GPT-4.5 due to not meeting expectations, offering only minor improvements and higher running costs, and soon disappeared. At the same time, "reasoning models" such as o1 and o3 performed well in specific fields, but exposed obvious shortcomings when applied to everyday chats. o3-pro even consumes excessive computing resources to generate simple greetings.

The Key Lies in Balance

Facing the limitations of early models, OpenAI hopes that GPT-5 will find a better balance between advanced reasoning and reliable daily communication. According to reports, the new model includes a mechanism for dynamically allocating computing resources based on task complexity, which is expected to avoid the "overthinking" issues of previous models.

Although the leaked document has been deleted, the information it revealed suggests that GPT-5 is more of an incremental upgrade rather than a revolutionary breakthrough. Whether users can feel significant improvements remains to be verified by its actual performance after the official release.