OpenAI Codex vs Devin
OpenAI Codex
Quick Verdict
OpenAI Codex excels at autonomous development and pr automation with a score of 96/100. OpenAI Codex has emerged as a legitimate Claude Code challenger, with GPT-5.
Devin
Quick Verdict
Devin excels at autonomous development and junior developer tasks with a score of 82/100. Devin pioneered the autonomous AI software engineer category, demonstrating that AI can independently complete complex development tasks from start to finish.
📊 Visual Score Comparison
Side-by-side comparison of key performance metrics across six evaluation criteria
Technical Specifications
| Feature | OpenAI Codex | Devin |
|---|---|---|
| Core AI Model(s) | Codex Web uses specialized o3 optimized for coding. Codex CLI uses GPT-5 by default with support for GPT-5.1-Codex-Mini for extended local usage. | Proprietary models optimized for autonomous coding with in-context reasoning capabilities. |
| Context Window | Large context via o3/GPT-5. Repository preloading enables full codebase understanding without manual file selection. | Large context with codebase analysis, pattern recognition, and code reuse detection. |
| Deployment Options | Codex Web runs in OpenAI's cloud sandboxes. Codex CLI is open-source and runs locally. Enterprise deployment options available. | Cloud-based platform with web interface. Enterprise deployment options with VPC and SSO support. |
| Offline Mode | Codex CLI supports local execution. Codex Web requires internet for cloud sandbox operation. | Cloud-based only, requires internet connection for all operations. |
Core Features Comparison
OpenAI Codex Features
- Dual-mode operation: Codex Web (cloud sandbox) and Codex CLI (local execution)
- Autonomous task execution running 1-30 minutes independently in cloud sandboxes
- Auto-review PRs with semantic understanding beyond static analysis
- Multimodal inputs: screenshots, diagrams, and images for context
- MCP (Model Context Protocol) integration for external tools
- Open-source CLI under permissive license
- Repository preloading for full codebase understanding
Devin Features
- Fully autonomous end-to-end software development
- Interactive planning with collaborative task scoping
- Multi-Devin parallel task execution
- Cloud-based IDE with VSCode-style interface
- Devin Wiki for auto-generated documentation
- Voice command integration for hands-free coding
- Git integration with PR creation and code review
Pricing & Value Analysis
| Aspect | OpenAI Codex | Devin |
|---|---|---|
| Pricing URL | View OpenAI Codex Pricing | View Devin Pricing |
| Overall Score | 96/100 | 82/100 |
| Best For | Autonomous Development, PR Automation, ChatGPT Ecosystem, Multimodal Coding, Enterprise Teams | Autonomous Development, Junior Developer Tasks, Parallel Task Execution, Enterprise Automation, Code Migration |
Best Use Cases
OpenAI Codex Excels At
- Autonomous feature implementation: describe the task, Codex works independently in a cloud sandbox for up to 30 minutes, then returns completed code with PR
- Automated PR review: tag Codex on any PR for semantic review that understands intent, runs tests, and catches bugs beyond static analysis
- Multimodal debugging: share screenshots of UI bugs or architecture diagrams—Codex interprets visual context to understand and fix issues
- Codebase exploration: ask questions about unfamiliar repositories, Codex navigates and explains code structure with full context
Devin Excels At
- Autonomous feature implementation from natural language descriptions—Devin plans, codes, tests, and deploys with minimal oversight
- Code migration projects like Ember to React or Ruby to Kotlin, handling large-scale rewrites autonomously
- Parallel task execution by spinning up multiple Devin instances to tackle different features simultaneously
- Junior developer task automation for bug fixes, documentation, and routine maintenance work
Performance & Integration
| Category | OpenAI Codex | Devin | Winner |
|---|---|---|---|
| IDE Support | IDE-agnostic via CLI. Integrates with GitHub for PR workflows. ChatGPT desktop and web interfaces. | Cloud-based VSCode-style IDE accessible via browser. No local installation required. | Tie |
| Community | Active community | Active community | Tie |
| Data Richness | Comprehensive | Comprehensive | Tie |
| Overall Score | 96/100 | 82/100 | OpenAI Codex |
The Bottom Line
Both OpenAI Codex and Devin are capable AI coding tools, but they serve different needs. OpenAI Codex scores higher (96/100 vs 82/100) and excels in autonomous development and pr automation. The choice depends on your specific workflow, team size, and technical requirements.
Choose OpenAI Codex if: you prioritize autonomous development and pr automation and want the higher-rated option (96/100).
Choose Devin if: you prioritize autonomous development and junior developer tasks and don't mind a slightly lower score for specialized features.