Devin vs OpenAI Codex CLI — Coding & Development AI tool comparison
OpenAI Codex CLI edges out Devin for Coding & Development.
Verdict
According to AI Tier List, OpenAI Codex CLI (Tier S) ranks higher than Devin (Tier A) for Coding & Development. CLI coding tool included with ChatGPT Plus
Tiers are not for sale. How we rank →
Specification comparison
| Attribute | Devin | OpenAI Codex CLI |
|---|---|---|
| Tier | Tier A | Tier S |
| Rating | 4 / 5 | 5 / 5 |
| Pricing | Freemium | Freemium |
| Category | Coding & Development | Coding & Development |
| Best For | Agentic, Overhyped, Low Success Rate | CLI, Agentic, Async, Cloud Agent |
Devin vs OpenAI Codex CLI: which should you choose?
Choose Devin if…
Overhyped AI software engineer
- Your priority is Overhyped, Low Success Rate — attributes OpenAI Codex CLI is not tagged with.
Choose OpenAI Codex CLI if…
CLI coding tool included with ChatGPT Plus
- You want the higher-rated option — Tier S on AI Tier List, above Devin at Tier A.
- Your priority is CLI, Async, Cloud Agent — attributes Devin is not tagged with.
What Devin and OpenAI Codex CLI actually do
Devin
Devin exemplifies AI overhype. Despite $10.2B valuation, independent tests show ~15% task success rate. Price drop from $500/month to $20/month signals struggles.
OpenAI Codex CLI
OpenAI Codex CLI comes included with ChatGPT Plus ($20/month) for great value. GPT-5.1-Codex achieves 77% on SWE-bench at ~50% lower cost per token vs Claude. Supports cloud agent mode.
Why Devin is Tier A and OpenAI Codex CLI is Tier S
Tier ADevin
Devin demonstrates the most advanced technical maturity in the autonomous agent space, occupying a unique position capable of executing complex engineering tasks beyond simple assistance. Recent desktop integration and pricing improvements have lowered barriers to practical adoption, solidifying its market influence.
Tier SOpenAI Codex CLI
With the integration of the GPT-5.6 model and a high-performance Rust-based architecture, it maintains top-tier performance in the terminal coding agent market. It remains highly competitive by offering superior integration with the OpenAI ecosystem and innovative features like real-time voice sessions compared to its rivals.
Devin vs OpenAI Codex CLI: strengths and weaknesses
Devin — Strengths
Fully autonomous agent architecture, Windsurf-integrated desktop app, support for Claude 3.5 Sonnet, scalability via ACP
Devin — Weaknesses
Stability issues in complex codebases, high cost structure, steep learning curve compared to competitors
OpenAI Codex CLI — Strengths
GPT-5.6 model support, fast local execution via Rust, WebRTC real-time voice sessions, MCP resource reading support, seamless workflow integration with ChatGPT Plus
OpenAI Codex CLI — Weaknesses
High dependency on the OpenAI ecosystem, lack of general-purpose flexibility compared to Claude Code, opaque enterprise pricing structure
Recent changes to Devin and OpenAI Codex CLI
DevinAug 2026
Introduced $20/month individual plan, launched Windsurf-based desktop app, integrated Claude 3.5 Sonnet model, introduced ACP protocol
OpenAI Codex CLIAug 2026
Set GPT-5.6 as default model, updated to v0.146.0, enabled WebRTC-based real-time voice sessions, enhanced MCP resource reading capabilities
Keep exploring Coding & Development
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FAQ
Which is better, Devin or OpenAI Codex CLI?
According to AI Tier List, OpenAI Codex CLI (Tier S) ranks higher than Devin (Tier A) for Coding & Development. CLI coding tool included with ChatGPT Plus
How much do Devin and OpenAI Codex CLI cost?
Devin is freemium, while OpenAI Codex CLI is freemium.
What is the difference between Devin and OpenAI Codex CLI?
Devin — Overhyped AI software engineer. OpenAI Codex CLI — CLI coding tool included with ChatGPT Plus. Where Devin falls short: Stability issues in complex codebases, high cost structure, steep learning curve compared to competitors. Where OpenAI Codex CLI falls short: High dependency on the OpenAI ecosystem, lack of general-purpose flexibility compared to Claude Code, opaque enterprise pricing structure.
Is Devin still worth it in 2026?
Right now Devin is rated Tier A for Coding & Development. Devin demonstrates the most advanced technical maturity in the autonomous agent space, occupying a unique position capable of executing complex engineering tasks beyond simple assistance. Recent desktop integration and pricing improvements have lowered barriers to practical adoption, solidifying its market influence. (last re-rated 2026-08-09)
Is OpenAI Codex CLI still worth it in 2026?
Right now OpenAI Codex CLI is rated Tier S for Coding & Development. With the integration of the GPT-5.6 model and a high-performance Rust-based architecture, it maintains top-tier performance in the terminal coding agent market. It remains highly competitive by offering superior integration with the OpenAI ecosystem and innovative features like real-time voice sessions compared to its rivals. (last re-rated 2026-08-09)