Comparison
Claude Code vs Codex
Both are coding agents that work on a real repository from the terminal. The main listed differences are who makes them and where else they run: Claude Code is from Anthropic and also works in supported editors, and Codex is from OpenAI and also works in an editor extension and in ChatGPT.
Only facts from the DreamBuilds listings and the vendors' official pages are used here. No benchmarks or scores.
| Claude Code | Codex | |
|---|---|---|
| Listing description | Anthropic's coding agent for the terminal and supported editors. It is not included in Claude's free plan. | OpenAI's coding agent for the terminal, an editor extension, and ChatGPT. The free ChatGPT plan includes limited Codex access. |
| Made by | Anthropic | OpenAI |
| Where you use it | Terminal and supported editors | Terminal, an editor extension, and ChatGPT |
| Free option | No, not included in Claude's free plan | Limited Codex access on the free ChatGPT plan |
| Pricing tier on DreamBuilds | Paid | Freemium |
| DreamBuilds use cases | coding agents, vibe coding | coding agents, vibe coding |
| Official site | https://claude.com/product/claude-code | https://openai.com/codex |
| Full listing | Claude Code on DreamBuilds | Codex on DreamBuilds |
Choose Claude Code if
You already pay for a Claude plan, or you want Anthropic's agent in your terminal and editor. DreamBuilds lists it as paid: it is not included in Claude's free plan.
Choose Codex if
You want to try a coding agent without a new subscription, or you already use ChatGPT. DreamBuilds lists Codex as freemium: the free ChatGPT plan includes limited access.
Use both
Many builders switch between the two, for example when one hits a usage limit. Apps like Harness by Autonomous, BAND and Starkomand run Claude Code and Codex side by side; see the multi-agent coding list.
FAQ
- Is Claude Code or Codex free?
- Codex has limited access on the free ChatGPT plan. Claude Code is listed as paid and is not included in Claude's free plan.
- Can I run Claude Code and Codex together?
- Yes. Harness by Autonomous, BAND and Starkomand are listed on DreamBuilds as apps that run both agents at the same time.
- Which is better?
- DreamBuilds does not score tools. Pick based on the plan you already pay for and where you want to work. The terminal coding agents list compares more options.
- Are there open-source alternatives?
- Yes. Aider and OpenCode are open-source terminal coding agents listed as Free on DreamBuilds.