Decision summary
- Need chatgpt.com hosting -> ChatGPT Sites
- Need a repo, tests, and your own host -> OpenAI Codex
- Need a managed cloud harness API -> OpenAI Agents API
- Need Claude or Gemini agents -> other comparison pages
Hosted app vs coding agent comparison
Frontier comparisonChatGPT Sites vs OpenAI Codex
ChatGPT Sites is OpenAI's public-beta product that creates, hosts, and shares websites and web apps from ChatGPT.
Featured · Updated 6 weeks ago · Last verified: September 2026
Choose ChatGPT Sites when
Prompt-to-hosted website, dashboard, or game on a ChatGPT URL.
Choose OpenAI Codex when
Repository coding, tests, and reviews you host yourself.
- Need chatgpt.com hosting: ChatGPT Sites
- Need a repo, tests, and your own host: OpenAI Codex
- Need a managed cloud harness API: OpenAI Agents API
Decision axes: Best for · Product surface · Job class · Access
Reasoning
Sites hides the deploy. Codex keeps you in the source.
Coding
Codex. Sites is not a git-native coding agent.
Multimodal
Sites can include generated images in the hosted page. Codex edits files.
Speed
Sites is faster to a public URL. Codex is faster to a reviewed commit.
Enterprise
Enterprise Sites public publishing is admin-gated and off by default. Codex follows workspace policy.
Curated matrix for ChatGPT Sites vs OpenAI Codex — confirm live limits and pricing on each vendor’s official pages.
How they compare
Criterion-by-criterion notes from the catalog—not a ranking. Validate on your own gold set.
| Choice | ChatGPT Sites | OpenAI Codex |
|---|---|---|
| Best for | Prompt-to-hosted website, dashboard, or game on a ChatGPT URL. | Repository coding, tests, and reviews you host yourself. |
| Product surface | chatgpt.com/sites and the ChatGPT desktop app. Mention website or @Sites. | Codex CLI, IDE, and ChatGPT coding surfaces. |
| Job class | Hosted output. Save a version, then deploy a production URL. | Coding agent. It does not replace Sites hosting. |
| Access | Plus, Pro, Business, Enterprise, and Edu. Not Free or Go. No public Sites API. | ChatGPT / Codex product plans. Can edit a local project that Sites later publishes. |
| Operational risk | No data residency at launch. Deployed URLs are production. Do not process PHI or payment-card data. | Still needs CI and review. Official docs say Sites has no standalone Codex CLI manager. |
Key insights
Concrete technical or product signals.
- Sites is a hosted artifact. Codex is an agent that writes code.
- You can still use Codex CLI to edit a local project before asking Sites to publish it.
- Every Sites deployment URL is production. Ask ChatGPT to save a version without deploying if you need a review candidate.
Use cases
Where this shines in production.
- Deciding whether a prompt should become a hosted Site or a repo PR
- Internal dashboards without a separate deploy pipeline
- Keeping coding work in Codex when you need tests and Git
Limitations & trade-offs
What to watch for.
- Not vs Cursor.
- Not vs Google Antigravity.
- Not vs OpenAI Agents API.
Watch-outs
Who should pass, and what to validate before rollout.
- Do not pick Sites for PHI or card data.
- Do not pick Codex expecting chatgpt.com hosting.
- Do not treat Sites as a public API.
Final recommendation
What to do after reading the table.
Start with the output. If it must live at a ChatGPT URL, use Sites. If it must live in git, use Codex.
FAQ
Is ChatGPT Sites better than OpenAI Codex?
Start with the output. If it must live at a ChatGPT URL, use Sites. If it must live in git, use Codex.
Can I use both ChatGPT Sites and OpenAI Codex?
Yes. Many teams keep both and route by constraint. Use ChatGPT Sites for Prompt-to-hosted website, dashboard, or game on a ChatGPT URL, and OpenAI Codex for Repository coding, tests, and reviews you host yourself. Confirm vendor terms before mixing them in one production workflow.