Simplifying contract reviews with AI

Fine-tuning now available for GPT-4o

Supporting sellers with enhanced product listings

Mercari leverages GPT-4o mini and GPT-4 to streamline selling, enhance product listings, and boost sales, transforming the online marketplace with features like AI Listing Support and Mercari AI Assistant.

Building AI-powered apps for business

Retool uses GPT-4 to give businesses a fast, secure way to build AI-powered apps.

Introducing GPT-5.4 mini and nano

GPT-5. 4 mini and nano are smaller, faster versions of GPT-5.

Using GPT-4 for content moderation

We use GPT-4 for content policy development and content moderation decisions, enabling more consistent labeling, a faster feedback loop for policy refinement, and less involvement from human moderators.

Introducing GPT-4.1 in the API

Introducing GPT-4. 1 in the API—a new family of models with across-the-board improvements, including major gains in coding, instruction following, and long-context understanding.

First look at GPT-5

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

Using GPT-4 to deliver a new customer service standard

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

Customizing GPT-3 for your application

Fine-tune with a single command.

How Ramp engineers accelerate code review with Codex

How Ramp engineers use Codex with GPT-5. 5 to review code and ship improvements, allowing them to get substantive feedback in minutes instead of hours.

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.

Introducing GPT-5 for developers

Introducing GPT-5 in our API platform—offering high reasoning performance, new controls for devs, and best-in-class results on real coding tasks.