LargeLanguageModels

GPT-5 launched August 7, 2025 and collapsed OpenAI’s entire model portfolio into one unified system, then the flagship routing feature broke on launch day. Nine months later, GPT-5 capabilities span 94.6% on advanced mathematics to autonomous GitHub issue resolution, while API pricing has quietly quadrupled. This guide separates the benchmark reality from the marketing, for the developers and founders actually building on it.