On the morning of August 6, OpenAI made a groundbreaking move by unveiling its first open-source language model, GPT-OSS, which garnered immediate attention from the global tech community. The GPT-OSS release comprises two versions: gpt-oss-120b and gpt-oss-20b, boasting 120 billion and 20 billion parameters respectively. These versions deliver performance that closely mirrors OpenAI's internal o4-mini and o3-mini models. Despite the absence of the highly anticipated GPT-5, the decision to open-source GPT-OSS marks a significant strategic shift for OpenAI, potentially igniting a fresh wave of open-source innovation.