OpenAI is rolling a new foundation model, GPT-5, via API for developers and enterprise users in three branded sizes — gpt-5, gpt-5-mini and gpt-5-nano — “to give developers more flexibility to trade off performance, cost, and latency.” The company said Thursday that it is also making GPT‑5 available to all ChatGPT Plus, Pro, Team and Free tier users. Enterprise and Education tier users are promised access this week. While GPT‑5 in the API platform is the reasoning model that powers maximum performance in ChatGPT, “GPT‑5 in ChatGPT is a system of reasoning, non-reasoning, and router models,” OpenAI explains.

OpenAI says GPT‑5 is its best model yet for coding and agentic tasks. It is also faster and less likely to hallucinate. A post with use-cases was accompanied last week by an 80-minute video presentation hosted by CEO Sam Altman.

The rollout “extend[s] to ChatGPT’s 700 million weekly active users, with varying usage limits based on subscription tier,” Ars Technica reports, explaining that “Pro subscribers will receive unlimited access to GPT-5 and the GPT-5 Pro variant, while Plus users receive ‘significantly higher usage limits’ compared to free users.”

This marks “the first time OpenAI has given free users access to a simulated reasoning AI model, which breaks problems down into multiple steps using a technique that tends to improve answer accuracy for logical or analytical questions,” according to Ars Technica.

TechRadar notes that this next iteration in the OpenAI family of models is “not dissimilar in its basic form” from its predecessors but is “big and complex enough to reach a new level in how it seems to reason.”

For the average user, the practical effect is “you no longer have to spoon-feed it context or restate complex prompts three times,” TechRadar says, explaining that “multifaceted questions like how changing interest rates might affect Gen Z homeownership trends in mixed markets might take several prompts refined multiple times to provide the answers you seek with earlier ChatGPT models, but GPT‑5 can unpack the whole thing.”

In a separate piece, TechRadar shares three useful free features, including a better writing assistant, improved ChatGPT Voice, and highlight colors, as well as the ability to “integrate with your Gmail” to understand more about your work habits.

In its pitch to developers, OpenAI calls GPT‑5 “a true coding collaborator” that in addition to laying down foundation codebase can fix bugs, edit and answering questions about complex codebases. “The model is steerable and collaborative,” OpenAI claims, citing SOTA benchmarks in a developer post.

Simultaneously, OpenAI investor Microsoft announced it is incorporating GPT-5 across products including Microsoft 365 Copilot for consumers and Microsoft Copilot for enterprise, in addition to developer tools like GitHub Copilot and Visual Studio Code.

Related:
OpenAI Finally Launched GPT-5. Here’s Everything You Need to Know, Wired, 8/7/25
OpenAI Unveils GPT-5, Its Latest and Most Powerful Model, After Two-Year Wait, The Wall Street Journal, 8/7/25
OpenAI Aims to Stay Ahead of Rivals with New GPT-5 Technology, The New York Times, 8/7/25
The New ChatGPT Resets the AI Race, The Atlantic, 8/7/25
Red Teams Jailbreak GPT-5 with Ease, Warn It’s ‘Nearly Unusable’ for Enterprise, SecurityWeek, 8/8/25