Codex vs Roo Code: How They Actually Differ
Codex fits builders who want a single OpenAI-backed agent that moves between CLI, IDE, and cloud and reviews GitHub pull requests. Roo Code fits VS Code users who want an open-source, bring-your-own-key agent with multi-mode workflows. Choose by surface area and provider flexibility, not price.
Compiled 2026-08-27 from our catalogue entries for Codex and Roo Code.
The short answer
- Pick Codex if
- You want one agent that runs across CLI, IDE, desktop, and cloud, want GitHub pull request review built in, and you're fine staying on OpenAI's GPT models.
- Pick Roo Code if
- You live in VS Code, want an open-source extension you can inspect, and need to switch between LLM providers like Claude, GPT, and Gemini on your own API keys.
- Cheapest way in
- Both have a $0 starting point. Codex's free tier is included with ChatGPT plans. Roo Code is free software, but you pay your LLM provider directly for the tokens it uses.
- What we could not compare
- Roo Code has no published plans on file, so subscription tiers cannot be lined up against Codex's. Public repo and docs availability also differ between the two and are not directly comparable.
Codex is OpenAI's agentic coding tool. It runs the same agent across a terminal CLI, an IDE extension, a desktop app, and a cloud environment, so work started in one surface can continue in another. It reads the shared AGENTS.md instructions file, supports the Model Context Protocol, and can spin up a cloud code review on a GitHub pull request that comments inline and proposes fixes. Plans are listed at Free $0/month, Go $8/month, Plus $20/month, Pro 5x $100/month, and Pro 20x $200/month, with Business and Enterprise not published. The catch noted on file is that it's locked to OpenAI's GPT models — no Claude or Gemini out of the box — and has fewer built-in customization primitives like hooks and sub-agents than some rivals.
Roo Code is an open-source autonomous coding agent for VS Code, forked from Cline and adding multi-mode workflows for different kinds of coding tasks. Its angle is flexibility and openness: a permissively licensed VS Code extension with bring-your-own-key across providers like Claude, GPT, and Gemini, and modes you switch between for different jobs. Two limits are listed: it's VS Code only — no JetBrains or other IDE extension — and you supply your own API keys rather than getting bundled inference. The sheet records no published plans, so pricing is not on file beyond the free model itself.
Side by side
Every cell is a field on our catalogue entry for that tool, copied as recorded. Rows where the two differ come first; blank fields say so rather than being filled in.
| Codex | Roo Code | |
|---|---|---|
| Pricing model | Freemium | Free |
| Starts at | Free — $0 /month | Free |
| Runs on | web, mac, win, linux, cli, vscode-ext | vscode-ext |
| Public source code | No public repo listed | Yes — public repo |
| Category | AI Coding Agents | AI Coding Agents |
| Public docs | Not listed | Not listed |
- Public source code: From the repository link on each catalogue entry, not a licence audit.
Where Codex is the better fit
- One agent runs across CLI, IDE, desktop, and cloud, so work can move between surfaces.
- Cloud GitHub pull request review that comments inline and proposes fixes.
- Included with ChatGPT plans from the free tier up through Pro; reads the AGENTS.md standard and supports MCP tools.
Where Roo Code is the better fit
- Open-source, released under a permissive license, with a public repo on GitHub.
- Multi-mode workflows for different coding tasks, forked from Cline.
- Bring-your-own-key across multiple LLM providers, including Claude, GPT, and Gemini.
Which one should you pick?
Cloud PR review, CLI + IDE + desktop + cloud surfaces, and ChatGPT plan bundling line up with a single-tool workflow.
Open-source, VS Code-native, multi-mode workflows, and the freedom to switch between Claude, GPT, and Gemini under your own keys.
Frequently asked questions
- Do I need a ChatGPT subscription to use Codex?
- No. A Free tier is listed at $0/month. Paid tiers Go, Plus, Pro 5x, and Pro 20x are also on file, while Business and Enterprise are not published.
- Does Roo Code include model inference?
- No. The sheet says you supply your own API keys for providers like Claude, GPT, and Gemini.
- Can Codex use Claude or Gemini?
- Not out of the box. The sheet says it is locked to OpenAI's GPT models.
- Is Roo Code available outside VS Code?
- No. The sheet says it is limited to VS Code with no JetBrains or other IDE extension available.
What we compared
This page states nothing that is not in the two catalogue entries below. The exact text used to write it is reproduced here so you can check our reading, and both tools link through to their own pages and to the vendor.
- /tools/codex — checked 2026-07-02 · official site
- /tools/roo-code — checked 2026-06-14 · official site
Show the source text
## Codex (/tools/codex) Tagline: OpenAI's coding agent — works in the terminal, IDE, and cloud, reviews GitHub pull requests, and runs on GPT-5 models. Category: AI Coding Agents Pricing model: freemium Starts at: Free — $0 /month Platforms: web, mac, win, linux, cli, vscode-ext Public repo: none listed Docs: none listed Verified plans (read 2026-08-21): Free $0 /month | Go $8 /month | Plus $20 /month | Pro 5x $100 /month | Pro 20x $200 /month | Business / Enterprise Not published | API Key Pay only for the tokens Codex uses, based on API pricing Strengths on file: Runs one agent across CLI, IDE, desktop, and cloud — work moves between surfaces.; Strong GitHub integration: a cloud code review on a pull request that catches real bugs and proposes fixes.; Reads the shared AGENTS.md standard and supports MCP tools.; Included with ChatGPT plans, from the free tier up through Pro. Limits on file: Locked to OpenAI's GPT models — no Claude or Gemini out of the box.; Fewer built-in customization primitives (hooks, sub-agents) than some rivals. Codex is OpenAI's agentic coding tool. It runs the same agent across a terminal CLI, an IDE extension, a desktop app, and a cloud environment, so work started in one surface can continue in another. It reads the shared AGENTS.md instructions file, speaks the Model Context Protocol (MCP), and can spin up a cloud code review on a GitHub pull request that comments inline and proposes fixes. Codex runs on OpenAI's GPT models — currently GPT-5.5 as the recommended frontier model — and is included with ChatGPT plans, from the free tier up through Pro. ## Roo Code (/tools/roo-code) Tagline: Open-source autonomous coding agent for VS Code, forked from Cline with multi-mode workflows. Category: AI Coding Agents Pricing model: free Starts at: Free Platforms: vscode-ext Public repo: https://github.com/RooCodeInc/Roo-Code Docs: none listed Verified plans: none on file Strengths on file: Open-source AI coding agent released under a permissive license.; Runs as a VS Code extension that integrates directly with the editor.; Forked from Cline while adding multi-mode workflows for different coding tasks.; Supports bring-your-own-key for multiple LLM providers including Claude, GPT, and Gemini. Limits on file: Limited to VS Code with no JetBrains or other IDE extension available.; Requires users to supply their own API keys rather than bundling inference. Roo Code is an open-source autonomous coding agent for VS Code, forked from Cline and adding multi-mode workflows for different kinds of coding tasks. Its angle is flexibility and openness: a permissively licensed VS Code extension with bring-your-own-key across providers like Claude, GPT, and Gemini, and modes you switch between for different jobs. It's for VS Code users who want Cline's inspectable, open approach with more workflow structure. Two limits: it's VS Code only — no JetBrains or other IDE extension — and you supply your own API keys rather than getting bundled inference. It's the multi-mode fork of Cline, in the same open, BYOK, in-VS-Code lane.
Change log
- 2026-08-27 — First published, compiled from the catalogue entries for Codex and Roo Code.