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OpenAI API

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Access to GPT-4, GPT-4.5, and cutting-edge AI models for developers

Updated Jan 22, 2025
API/SDK ToolPay-per-useWebAll platforms via API

About

The OpenAI API provides access to state-of-the-art AI models including GPT-4, GPT-4.5, and DALL-E. With multimodal capabilities, structured outputs, and extensive documentation, OpenAI's API is the foundation for thousands of AI applications. Pay-per-use pricing makes it accessible for projects of all sizes, from small prototypes to enterprise applications processing billions of tokens.

Key Features

  • GPT-4, GPT-4.5, and other leading models
  • Multimodal (text, images, audio)
  • Function calling and tool use
  • Structured JSON outputs
  • Vision and image understanding
  • Fine-tuning capabilities
  • DALL-E image generation
  • Whisper speech-to-text

Use Cases

  • Building AI-powered applications
  • Chatbots and conversational AI
  • Code generation and analysis
  • Content creation and summarization
  • Image generation and editing
  • Speech-to-text transcription

Technical Details

Languages

PythonJavaScriptAll languages (REST API)

AI Models

GPT-4GPT-4.5GPT-3.5 TurboDALL-E 3WhisperTTS

Integrations

REST APIOpenAI SDKsLangChainLlamaIndex

Frequently Asked Questions

What is OpenAI API?

The OpenAI API provides access to state-of-the-art AI models including GPT-4, GPT-4.5, and DALL-E. With multimodal capabilities, structured outputs, and extensive documentation, OpenAI's API is the foundation for thousands of AI applications. Pay-per-use pricing makes it accessible for projects of all sizes, from small prototypes to enterprise applications processing billions of tokens.

How much does OpenAI API cost?

OpenAI API offers pay-per-use pricing. Plans include: Pay As You Go: Usage-based.

What programming languages does OpenAI API support?

OpenAI API supports 3+ programming languages including Python, JavaScript, All languages (REST API).

What AI models does OpenAI API use?

OpenAI API is powered by GPT-4, GPT-4.5, GPT-3.5 Turbo, DALL-E 3, Whisper, TTS.

What platforms does OpenAI API support?

OpenAI API is available on Web, All platforms via API.

What can OpenAI API do?

OpenAI API provides code completion, code generation, debugging, AI chat, agentic/autonomous mode. Key features include: GPT-4, GPT-4.5, and other leading models, Multimodal (text, images, audio), Function calling and tool use.

Pricing

Pay As You Go

Usage-based
  • Access to all models
  • Structured outputs
  • Function calling
  • Vision capabilities

Company

Name
OpenAI
Founded
2015
Location
San Francisco, CA
Users
Millions of developers

Links

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