API & Codex (developer platform)

Name: API & Codex (developer platform)
Brand: OpenAI

Generally Available

Overview

Exposes the GPT-5 family, Sora video, and agent tooling to developers. Codex is OpenAI's flagship agentic coding system, spanning a CLI, IDE extension, cloud task delegation and a GitHub bot.

Roughly 4 million developers build on the platform; Codex is generally available and among OpenAI's fastest-growing products.

Key Specs

Developers

~4M