OpenAI Codex CLI vs Devin

Pick two tools from the same category to compare side-by-side.

	OpenAI Codex CLI OpenAI's official terminal coding agent; adopts the SKILL.md standard.	Devin Cognition's autonomous cloud software engineer that plans, codes, tests, and opens pull requests on its own.
Category	harness	harness
Vendor type	open source	commercial
Pricing	freemium	freemium
Strengths	+ Adopts cross-vendor SKILL.md standard + Open source + Native OpenAI Responses API integration	+ Fully autonomous cloud sessions that run tasks end to end without local setup + Access to multiple frontier model families plus Cognition's own SWE models + Quota-based plans scale from a free tier to high-usage Max and Teams tiers
Tradeoffs	− Smaller plugin ecosystem than Claude Code	− Works best on well-scoped tasks; practitioners report mixed results on ambiguous or large refactors − Quota allowances can deplete quickly on long autonomous runs, pushing users to API-priced top-ups − Closed source with less interactive steering than pair-programming style CLI agents
Used in stacks	0	0