ChatGPT Codex vs OpenCode
Codex is OpenAI's hosted agentic coding tool, tied to a ChatGPT account and OpenAI's infrastructure. OpenCode is a self-hosted CLI agent that lets you wire in any of 75+ LLM providers, so your choice of model and where your code goes stays entirely under your control.
How to choose
Decision axis: Hosted and locked-in vs. self-hosted and provider-agnostic
Pick ChatGPT Codex if…
Pick this if you want a ready-to-run agentic coding tool with no setup, you are already in the OpenAI ecosystem, and you have no hard requirement to use a specific model or keep your code off third-party servers.
Pick OpenCode if…
Pick this if you need to choose your own LLM provider, want your agent running locally or on your own infrastructure, or work in an environment where routing code through OpenAI's servers is not acceptable.
| Attribute | ||
|---|---|---|
| Summary | AI Coding Agent by OpenAI | Open Source Terminal AI Agent |
| Community Score | 57/100 | 27/100 |
| Pricing | ✓ Free | ✓ Open Source |
| Go$8/mo | — | |
| Plus$20/moPopular | — | |
| Business$20/mo | — | |
| Pro$100/mo | — | |
| — | EnterpriseContact Sales | |
| View pricing → | View pricing → | |
| Platform | WINDOWS, MACOS, LINUX, ANDROID, IOS, Web, API, VSC_EXTENSION, CLI | WINDOWS, MACOS, LINUX, Web, API, VSC_EXTENSION, CLI |
| API / SDK | API | API + SDK |
| Docs / Source | ||
| Developer | OpenAI, Inc. | Anomaly Innovations |
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| Data refreshed | Sep 8, 2026 | Sep 5, 2026 |
