OpenAI

API & Codex (developer platform)

Generally Available

Exposes the GPT-6 family (Astra, Sol and Luna), 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. GPT-6 Sol and Luna became available in the API on September 22, 2026, and GitHub Copilot added both models the same day.

Latest update Sep 25, 2026

API & Codex (developer platform)

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Current status

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

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Specifications1

Developers
~4M

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