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Build and scale AI experiences powered by industry-leading models and tools.

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Flagship models

GPT-4o

Our high-intelligence flagship model for complex, multi-step tasks

Text and vision
128k context length
Input: $5 | Output: $15 per 1M tokens

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GPT-4o mini

Our affordable and intelligent small model for fast, lightweight tasks

Text and vision
128k context length
Input: $0.15 | Output: $0.60 per 1M tokens

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Introducing OpenAI o1-preview and OpenAI o1-mini, our new models with reasoning capabilities.

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Access the power of our models with APIs

Chat Completions API

Get access to our most powerful models with a few lines of code.

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A screenshot of code showing a request to an AI model (`gpt-4.0`) to create a haiku. The displayed haiku reads: "Silent circuits hum, Echoes of thought, code woven— Dreams in silicon." The code uses a `completion` function to generate the text.

Build AI-native experiences with our tools and capabilities

Knowledge retrieval

Give the model access to your data for intelligent retrieval in your AI applications.

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The image shows a file management interface for "Quarterly earnings." It includes details like file size, last active date, expiration policy, and creation date. Three PDF files are attached, with options to add files, create an assistant, or copy IDs.

Code interpreter

Get models to run code iteratively to solve challenging code and math problems, and generate charts.

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The image shows a Python code snippet in a math tutorial explaining how to generate the first 10 Fibonacci numbers and calculate their sum. The code appends the Fibonacci numbers to a list and computes the sum, the output showing the sequence and total.

Function calling

Instruct the model to intelligently interact with your codebase and APIs using custom functions.

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The image shows a Python code snippet where an assistant is created using OpenAI's API. The assistant is programmed as a weather bot with functions to retrieve the current temperature and the probability of rain for a specified location using GPT-4o.

Vision

Get the model to understand and answer questions about images using vision capabilities.

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The image shows an AI chat where a user asks, "What is this plant?" with a small plant image. The assistant identifies it as Sansevieria trifasciata, providing details about its care and uses. Settings for temperature and privacy are on the right.

JSON Mode

Guarantee JSON outputs from the model when you enable JSON mode.

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The image shows a cURL command using OpenAI's API to send a request for the population of the three largest cities in the world. The assistant responds in JSON format, listing Tokyo, Delhi, and Shanghai with their respective populations.

Streaming

Display model outputs in real-time as they are generated.

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Customize models for your needs

Fine-tuning

Customize a model’s existing knowledge and behavior for a specific task using text and images via supervised fine-tuning. Plus, use our Model Distillation tools to fine-tune smaller models on the outputs of more capable models.

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The image shows a model training interface for "ft:gpt-6." It includes details like status, base model, creation date, checkpoints, and steps. A graph at the bottom shows the training and validation loss over time, showing the model's performance progress.

See what you can build in Playground

Explore our models and APIs in Playground without writing a single line of code.

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The image shows a chat where a user asks, "How do I get started with OpenAI's API?" The assistant provides steps on signing up, getting API keys, and accessing documentation. Temperature and token settings are visible on the right.

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Our customers are leading the way with AI-powered customer service, knowledge management, recommendation engines, audio translation, content generation, and more.

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Oscar brings AI to health insurance, reducing costs and improving patient care