Open AI

OpenAI’s letter to Governor Newsom on harmonized regula...

We’ve just sent a letter to Gov. Gavin Newsom calling for California to lead the...

Scaling accounting capacity with OpenAI

Built with OpenAI o3, o3-Pro, GPT-4.1, and GPT-5, Basis’ AI agents help accounti...

First look at GPT-5

See how a group of leading developers use GPT-5 for the first time.

How Cursor uses GPT-5

Learn how Cursor uses GPT-5.

How Amgen uses GPT-5

Learn how Amgen uses GPT-5.

Creative writing with GPT-5

Learn how GPT-5 assists with creative writing.

Medical research with GPT-5

Learn how GPT-5 is used for medical research.

Coding and design with GPT-5

Learn how GPT-5 unlocks new possibilities in coding and design.

Introducing GPT-5

We are introducing GPT‑5, our best AI system yet. GPT‑5 is a significant leap in...

GPT-5 System Card

GPT-5 offers high reasoning performance, new controls for devs, and best-in-clas...

From hard refusals to safe-completions: toward output-c...

Discover how OpenAI's new safe-completions approach in GPT-5 improves both safet...

Introducing GPT-5 for developers

Introducing GPT-5 in our API platform—offering high reasoning performance, new c...

GPT-5 and the new era of work

GPT-5 is OpenAI’s most advanced model—transforming enterprise AI, automation, an...

Providing ChatGPT to the Entire U.S. Federal Workforce

Today, OpenAI for Government is announcing a new partnership with the U.S. Gener...

Introducing gpt-oss

We’re releasing gpt-oss-120b and gpt-oss-20b—two state-of-the-art open-weight la...

gpt-oss-120b & gpt-oss-20b Model Card

We introduce gpt-oss-120b and gpt-oss-20b, two open-weight reasoning models avai...

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