Codex CLI vs Devin
Codex CLI (CLI / terminal agent, Included with ChatGPT plans) vs Devin (cloud autonomous agent, From $20/mo (Pro)): pricing, models, open-source status, benchmarks, and best use cases. See which AI coding agent is right for your workflow.
Codex CLI
Devin
| Comparison | Codex CLI | Devin |
|---|---|---|
| Category | CLI / terminal agent | cloud autonomous agent |
| Type | Terminal agent | Cloud autonomous agent |
| Vendor | OpenAI | Cognition |
| Pricing | Included with ChatGPT plans | From $20/mo (Pro) |
| Open source | Yes | No |
| Models | GPT-5.5, GPT-5.3 Codex, o-series reasoning | Claude, GPT, Gemini, Cognition SWE-1.6 |
| Benchmarks | Terminal-Bench: 82.7% | Not published |
| Best for | OpenAI ecosystem users, parallel task execution, open-source terminal workflows | Delegated issue work, async PR generation, engineering throughput |
Codex CLI is open source and best for openai ecosystem users, parallel task execution, open-source terminal workflows. OpenAI's open-source terminal coding agent. Supports parallel tasks and routes to GPT-5.5 and Codex models. Included with ChatGPT subscriptions; can also run on API keys.
Devin is proprietary and best for delegated issue work, async pr generation, engineering throughput. Cognition's autonomous cloud agent. Assign issues or tasks; Devin works asynchronously — creating branches, writing code, running tests, and opening PRs. Self-serve plans use token quotas (March 2026); Enterprise uses ACUs.
Both tools are part of the 2026 AI coding agent landscape. The right choice depends on whether you need a CLI / terminal agent or a cloud autonomous agent, your budget, and which models you prefer. See the full list of coding agents on our coding agents page to compare more options.