API Reference

Explore detailed documentation for each API offered by OpenAI and Anthropic.

Chat API

Conversational responses using GPT-5.4

Embeddings API

Generate vector embeddings for search & clustering

Completions API

Legacy text completions using GPT-4 models

Images API

Generate images from text prompts

Audio API

Speech-to-text and text-to-speech with GPT-5.4

Moderations API

Classify text for safety categories

Models API

List all available models