GPT-5

In August 2025, the AI field witnessed a period of intensive releases from OpenAI. Following GPT-2 (OpenAI, 2019) in 2019, OpenAI has once again contributed to the open-source community with its first open-weight large language model series, gpt-oss (OpenAI, 2025), available in 120B and 20B sizes. Shortly after, the highly anticipated next-generation flagship model, GPT-5 (OpenAI, 2025), was also officially launched. This series of releases not only marks a new high for open-source models in reasoning and agent capabilities but also reveals OpenAI’s latest advancements in model architecture, training methodologies, and safety alignment. ...