OpenAI API
The API suite for GPT-4, o1, embeddings, and DALL·E — the most widely integrated AI API in production software.
The OpenAI API provides programmatic access to GPT-4 and o1 (chat completions), text embeddings, image generation via DALL·E, and speech-to-text via Whisper. It is the most widely used AI API in production, appearing in integrations across every industry vertical. Understanding the API deeply — including streaming, function calling, structured outputs, token management, and cost optimization — is now a common expectation for software engineers at companies building AI features.
Typical time to job-readiness: ~2 weeks.