Replit Agent vs OpenAI Codex
Short answer: Replit Agent is in AI app builders; OpenAI Codex is in CLI coding agents, so they solve different parts of the job. OpenAI Codex has the lower entry price ($8/month vs $20/month for Replit Agent). Both Replit Agent and OpenAI Codex have a free plan.
| Replit Agent | OpenAI Codex | |
|---|---|---|
| Type | AI app builders | CLI coding agents |
| Vendor | Replit | OpenAI |
| Status | Active | Active |
| Free plan | Yes (Starter plan is free with 1 published app (docs.replit.com/billing/plans/starter-plan).) | Yes (Codex is included in ChatGPT Free (quick coding tasks).) |
| Paid plans from | $20/mo | $8/mo |
| Plans | Starter: Free · Core: $20 · Pro: $100 · Enterprise: — | Free: Free · Go: $8 · Plus: $20 · Pro: $100 · Business: $25 · Enterprise & Edu: — |
| Open source | Not verified yet | Not verified yet |
| Editors named on vendor page | — | terminal/CLI |
| Features named on vendor page | — | MCP, self-hosting, code review, code completion, security scanning, background/cloud agents, SSO/SAML |
| Model families named | — | Claude, OpenAI GPT |
| Checked | Oct 26, 2026 | Oct 26, 2026 |
“Named on vendor page” means the phrase appears on the vendor's own page we captured; it is not a hands-on test. Unknown values are left blank rather than guessed.
FAQ
Is Replit Agent cheaper than OpenAI Codex?
OpenAI Codex has the lower entry price ($8/month vs $20/month for Replit Agent). Prices are from each vendor's pricing page.
Do Replit Agent and OpenAI Codex have free plans?
Both Replit Agent and OpenAI Codex have a free plan.
What is the difference between Replit Agent and OpenAI Codex?
Replit Agent is in AI app builders; OpenAI Codex is in CLI coding agents, so they solve different parts of the job. Replit Agent is made by Replit; OpenAI Codex is made by OpenAI. See the table for plans, editors and features each vendor names.
Sources
- https://replit.com/pricing
- https://docs.replit.com/billing/plans/replit-pro.md
- https://developers.openai.com/codex/pricing