OpenAI has released a GPT-5 system card explaining how their unified model routing system works. The system uses three main components: gpt-5-main, gpt-5-thinking, and lightweight versions like gpt-5-thinking-nano, optimized for different tasks and developer use. This allows the system to provide fast and smart responses by selecting the most suitable component for each task. --- Why it matters: This matters because it shows how OpenAI is optimizing their models for specific tasks, which could lead to more efficient and effective AI systems in the future. Source: https://openai.com/index/gpt-5-system-card