Codex vs Devin
The battle of the autonomous coding agents. Codex and Devin both work independently on tasks in sandboxed environments, but Codex is bundled with ChatGPT subscriptions starting at $20/mo while Devin costs $500/mo. Codex excels at running many tasks in parallel; Devin handles longer, more complex multi-step engineering work. Budget and task complexity are the deciding factors.
Codex
Choose if: You want an affordable autonomous agent that can run multiple tasks in parallel, and you already have a ChatGPT subscription.
OpenAI's cloud-based coding agent
Devin
Choose if: You need a fully autonomous engineer for complex, long-running tasks and can justify the $500/mo enterprise pricing.
Autonomous AI software engineer
Feature Comparison
| Feature | Codex | Devin |
|---|---|---|
| Starting price | $20/mo (ChatGPT Plus)✓ | $500/mo |
| Parallel tasks | Multiple agents at once✓ | Limited |
| Autonomy level | High | Highest — full plan/code/debug✓ |
| Complexity ceiling | Moderate-high | High✓ |
| Environment | Cloud sandbox | Own VM with terminal + browser✓ |
| AI model | GPT-5.3/5.4-Codex | Proprietary multi-model |
| PR workflow | Proposes PRs for review | Full git workflow |
| Target audience | Developers / ChatGPT users | Engineering teams |
Pricing Comparison
Codex
| Plus (via ChatGPT) | $20/mo |
| Pro (via ChatGPT) | $200/mo |
| Enterprise (via ChatGPT) | $0/mo |
+ Requires ChatGPT Plus/Pro/Enterprise subscription, Usage limits vary by plan tier
Devin
| Core | $500/mo |
+ Compute costs for long-running tasks, API costs for connected services
Pricing last verified: 2026-03-17
Codex: Strengths & Limitations
Strengths
- +Runs multiple agents in parallel — tackle several tasks simultaneously
- +Cloud sandboxed environments preloaded with your repo
- +Powered by dedicated Codex models (GPT-5.3/5.4-Codex)
- +Backed by OpenAI — rapid iteration and strong model improvements
Limitations
- -Requires a ChatGPT subscription — no standalone plan
- -Cloud-only — no local execution option
- -Less transparent mid-task than copilot-style tools
- -Newer product — still maturing compared to established AI IDEs
Devin: Strengths & Limitations
Strengths
- +Fully autonomous — can plan, code, debug, and deploy independently
- +Handles complex multi-step engineering tasks
- +Can learn codebases and work with existing repos
- +Runs its own environment with terminal, browser, and editor
Limitations
- -Expensive — $500/month starting price
- -Can go off track on ambiguous tasks without clear specs
- -Slower than manual coding for simple tasks
- -Opaque process — harder to guide mid-task than copilot-style tools
Which One Should You Pick?
Codex is best for: Developers who want to delegate multiple coding tasks to parallel cloud agents.
Devin is best for: Engineering teams that want to delegate entire tasks to an AI agent.
Last updated: 2026-03-17