LangChain vs OpenAI Codex
LangChain LangChain
Open source frameworks for LLM apps and agents (LangChain, LangGraph) plus LangSmith for tracing.
VisitOpenAI Codex OpenAI
OpenAI’s coding agent, in ChatGPT, a terminal CLI and IDE extensions, that works on tasks in the cloud or locally.
VisitSide by side
| Property | LangChain | OpenAI Codex |
|---|---|---|
| Type | Product | Product |
| Category | AI agents and automation | AI coding tools |
| Made by | LangChain | OpenAI |
| Pricing | Free | Paid |
| Open source | Yes | Yes |
| API | Yes | Yes |
| Platforms | API, Self-hosted | Terminal, IDE, Web |
| Startup | Yes | Yes |
Features
Only LangChain
- agent framework
- rag
- observability
Both
None
Only OpenAI Codex
- coding agent
- terminal
- autonomous
- mcp
- code review