OpenAI launches GPT-5 as a unified system with built-in thinking for mainstream and enterprise use

[Founding Archive] AI20 editorial coverage based on OpenAI (2025-08-07). On 7 August 2025, OpenAI introduced GPT-5, describing it as its best AI system to date — a unified model family with built-in thinking that routes between faster responses and longer reasoning. OpenAI positions GPT-5 as a significant leap over prior systems across coding, math, writing, health and visual perception, available to ChatGPT users with differentiated usage by plan, and with Pro subscribers receiving GPT-5 Pro for extended reasoning. The company says rollout began the same day for Plus, Pro, Team and Free users, with Enterprise and Edu access following the next week, and notes API availability for developers. OpenAI also published companion materials including a GPT-5 System Card detailing the router architecture and safety approach. For AI20 readers, the release marks another step in frontier systems becoming default workplace infrastructure rather than specialist tools. Why it matters: When frontier models become the default interface for knowledge work, procurement, assurance and change-management decisions accelerate. Leaders should update evaluation harnesses, data-handling policies and human-oversight designs as quickly as they update vendor shortlists. AI20 perspective: Capability jumps raise the premium on shared evaluation, safety evidence and interoperable governance. AI20’s role is to help members adopt powerful systems without fragmenting trust standards across jurisdictions and sectors. (Category: Research; Region: Global; Tags: GPT-5; frontier models; reasoning; ChatGPT; API; model release. Original source: https://openai.com/index/introducing-gpt-5/)