API Platform

Build leading AI products on OpenAI’s platform

Powered by our frontier models

Our industry-leading models are designed for real-world utility, delivering advanced intelligence and multimodal capabilities.

Start working with GPT-5

The all-in-one platform for agents

Build, deploy, and optimize production-ready agents faster with pre-built components or from scratch.

Screenshot of a visual workflow titled “Utility Comparison,” showing connected modules labeled “Start” and “Customer lookup Connector” in a flowchart interface on a light background.

Build

Build agents on a visual-first canvas with Agent Builder or in a code-first environment with the Agents SDK.

Utility analysis card showing a 6-month average energy usage of 1,082 kWh. Text notes the home used ~22% more energy than comparable homes, with largest differences in July and August. Green and blue bar chart displayed below.

Deploy

Create customizable, front-end agentic experiences with ChatKit.

Interface titled “Create a grader” showing evaluation criteria for responses, including fields like “Was the response accurate” and grader results marked “Pass” for reasoning-based checks, on a light background.

Optimize

Run evals to measure agentic performance, and improve results with prompt optimization and fine-tuning.

Bring AI experiences to life

Use cases driven by our platform

Coding

Accelerate development cycles with models that write, review, debug, refactor, and migrate code.

Customer support

Deliver faster customer support with models that resolve issues autonomously and handle customer queries.

Personalized recommendations

Surface recommendations tailored to your customers to drive engagement, retention, and revenue.

Research & data analysis

Turn complex data into clear insights and synthesized findings.

Content generation

Produce high-quality content across text, image, and video to match your brand's look and feel.

Education

Enhance learning with AI tools for lesson planning, tutoring, and support.