Codex vs Devin
Codex and Devin are both popular tools in the AI Agents space. Both use a paid pricing model, with Codex starting at Usage-based and Devin at $500/mo. Below we break down features, pricing, strengths, and weaknesses to help you decide which tool fits your workflow best.
Last updated: March 2026
Quick Verdict
Choose Codex if you want openai's cloud-based ai coding agent for autonomous software engineering.. Codex's biggest strengths include runs tasks in parallel without blocking your machine and sandboxed execution ensures safe code changes. Choose Devin if you prefer the world's first fully autonomous ai software engineer.. Key advantages include most autonomous ai coding agent available and can handle end-to-end tasks without hand-holding.
OpenAI's cloud-based AI coding agent for autonomous software engineering.
| Codex | Devin | |
|---|---|---|
| Pricing | Usage-based | $500/mo |
| Free Tier | No | No |
| Pricing Model | Paid | Paid |
| Rating | ★ 4.2 | ★ 4.2 |
| Categories | Code Generation, AI Agents | AI Agents |
| Key Features | 6 features | 5 features |
| Feature | Codex | Devin |
|---|---|---|
| Cloud-based autonomous coding agent | ✓ | — |
| Parallel task execution in sandboxed environments | ✓ | — |
| Reads codebase, writes code, and runs tests | ✓ | — |
| Generates pull requests with verifiable changes | ✓ | — |
| Integrated into ChatGPT interface | ✓ | — |
| AGENTS.md configuration for project context | ✓ | — |
| Fully autonomous coding from task description to deployment | — | ✓ |
| Sets up its own dev environment and toolchain | — | ✓ |
| Plans, codes, debugs, and tests independently | — | ✓ |
| Handles complex multi-step engineering tasks | — | ✓ |
| Slack integration for task assignment and updates | — | ✓ |
Codex
Pros
- + Runs tasks in parallel without blocking your machine
- + Sandboxed execution ensures safe code changes
- + Tight integration with OpenAI's latest models
- + Provides citations and test results for verifiability
Cons
- − Requires OpenAI Pro or Team subscription
- − Limited control over execution compared to local agents
- − Still in early access with limited availability
Devin
Pros
- + Most autonomous AI coding agent available
- + Can handle end-to-end tasks without hand-holding
- + Great for repetitive or well-defined engineering tasks
Cons
- − Very expensive at $500/mo for teams
- − Output quality varies on complex or ambiguous tasks
- − Limited transparency into decision-making process
The Bottom Line
Choose Codex if: you want openai's cloud-based ai coding agent for autonomous software engineering.. Keep in mind: requires openai pro or team subscription.
Choose Devin if: you prefer the world's first fully autonomous ai software engineer.. Keep in mind: very expensive at $500/mo for teams.
Both tools compete in the AI Agents space. The right choice depends on your specific needs, team size, and budget.
