OpenAI API
OpenAI's developer API providing access to GPT, image generation, embeddings, and audio models for building AI-powered applications.
About
The OpenAI API gives developers programmatic access to OpenAI's full model lineup, including GPT-5.5 and GPT-5.4 for text and reasoning, DALL-E for image generation, Whisper for speech-to-text, and embedding models for semantic search. Pricing is per token, with flagship models costing around $2.50 to $5 per million input tokens and lightweight models like o4-mini available at a fraction of that. Cost-reduction options include the Batch API for 50 percent savings on asynchronous workloads, prompt caching for repeated content, and routing to smaller models for simpler tasks. The API is aimed at developers and businesses building chatbots, automation tools, content pipelines, and any application requiring language or vision intelligence.