OpenAI Codex
OpenAI class A live
OpenAI's 2025 agentic coding product: Apache-2.0 CLI plus cloud agent and IDE, powered by GPT-5.x; free tier plus paid plans.
Layer 1 — factual axes
| Pricing | Free · Go $8/mo · Plus $20/mo · Pro $100–200/mo · API usage-based | official | source ↗ 2026-07-04 |
|---|---|---|---|
| Model | own (GPT-5.5 / GPT-5.4 / GPT-5.4 mini) | official | source ↗ 2026-07-04 |
| Agentic | yes | official | source ↗ 2026-07-04 |
| Open source | open · Apache-2.0 (CLI only; cloud/models closed) | official | source ↗ 2026-07-04 |
| Form | cloud agent (+ CLI + IDE) | official | source ↗ 2026-07-04 |
| Free tier | limited | official | source ↗ 2026-07-04 |
Layer 2 — output quality
No independent measure yet. We publish a quality figure only when a named external benchmark ranks this model — we don’t invent one.
OpenAI’s 2025 agentic coding product: Apache-2.0 CLI plus cloud agent and IDE, powered by GPT-5.x; free tier plus paid plans.