Introducing the GPT Store

First look at GPT-5

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

Introducing GPT-5.1 for developers

GPT-5. 1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools.

Using GPT-4 to deliver a new customer service standard

Ada uses GPT-4 to deliver a new customer service standard

Introducing GPT-4o and more tools to ChatGPT free users

Introducing GPT-4o and more tools to ChatGPT free users We are launching our newest flagship model and making more capabilities available for free in ChatGPT.

Welcome GPT OSS, the new open-source model family from OpenAI!

Fine-tuning now available for GPT-4o