A decision for a beginner, not a spec sheet. Scores are our weights. Prices are the public plans, and anything marked verify on the tool page should be re-checked before you pay.
Pick OpenAI Codex if you already pay for ChatGPT and want the coding agent in that allowance.
Pick Replit if you are learning by building a web app, script, or simple browser game in one place.
A coding agent included with ChatGPT, not a separate app subscription.
Cheapest verified paid plan: Plus · $20/mo
A browser IDE and agent, closest thing here to an all-in-one starter.
Cheapest verified paid plan: Core · $20/mo
Web app or SaaS
Mobile app
Game
Website or landing page
Automation or script
No code
I can follow a change
I already develop
Last verified 2026-10-19
Individual
Free
VerifiedLimited trial access to Codex and limited access to GPT-5.6. Codex pricing docs also list GPT-6 Luna at Standard speed in the desktop app, subject to rollout. No published prompt count.
Confirmed on the Codex pricing page as a limited trial. GPT-6 Luna on Free is listed as subject to rollout, so it is not treated as a guarantee.
Individual
Confirm on chatgpt.com/pricing
VerifyLimited Codex, above Free. Codex pricing docs at learn.chatgpt.com/docs/pricing list Go at $8/mo. chatgpt.com/pricing still did not print a dollar amount on 2026-10-19.
Left out of budget matching. The $8 figure is on a Codex pricing doc, and the live ChatGPT pricing page still does not show it.
Individual
$20/mo
VerifiedExpanded Codex for a few focused sessions a week. Codex app on macOS and Windows. Local and cloud usage share the allowance. Weekly limits may apply. GPT-6 Astra access is limited, with credits for more.
Plus is $20/mo on OpenAI's help center. Annual billing is not offered.
Individual
$100/mo
VerifiedHigher Codex allowance for longer daily sessions. GPT-6 Astra is included in the allowance. Ultrafast is not included.
From OpenAI's Pro tiers help article.
Individual
$200/mo
VerifiedMore included usage than Pro 100. Ultrafast is not included. New subscriptions may have a lower allowance than older Pro 200 accounts.
OpenAI says the monthly price remains $200.
Individual
$500/mo
VerifiedHighest included Pro usage. Ultrafast for GPT-6 Astra and GPT-6.1 Sol is included and draws the included allowance at 8× the Standard rate for that model.
Ultrafast is only on this Pro tier. The 8× rate is from OpenAI's Pro tiers help article.
Last verified 2026-10-19
Individual
Free
VerifiedDaily Agent allowance and Free Mode with a daily cap. One published app, listed as 30-day on the Core comparison table. Built-in database. Exact daily credit count is not a single published number.
The 30-day publish window is on the Core plan comparison table. The daily credit count is still not one published number.
Individual
$20/mo
VerifyOn 2026-10-19 the pricing page showed $18/mo billed annually next to $20. The page still mixes the subscription price, the annual rate, and the $20 credit line.
$20 toward more powerful models. The pricing page listed up to 30 hours of Free Mode chat and up to 60 projects on Free Mode. Credits do not roll over.
Core docs list 1 active background task. The pricing page on 2026-10-19 did not print a parallel-task count. The $20 subscription figure is used for matching and marked verify because the page layout mixes it with the annual rate and the credit line.
Individual
$100/mo
VerifyThe pricing page showed $90/mo billed annually on 2026-10-19.
$100 toward more powerful models, more Free Mode usage, up to 15 collaborators, and database rollback up to 28 days. Docs say unused credits roll for two months.
The $100 list price is consistent. The $90 annual rate is marked verify with the rest of this card because the pricing page markup is easy to misread.
Plan allowance, with weekly limits that may also apply. Local messages and cloud chats share it. OpenAI does not publish one universal reset clock.
Switch to a lower-cost model. OpenAI says that stretches the same allowance.
Starter keeps a daily cap. Core and Pro Free Mode allowances reset every five hours and also have weekly limits, per Replit's plan docs. Core credits reset each billing cycle and do not roll over. Pro credits roll for two months.
Stay in Free Mode for everyday agent work. Power and Max spend credits and Replit asks before a paid action.
OpenAI Codex Plus and Replit Core are both listed at $20/mo. Replit Core is marked verify.
OpenAI Codex is for developers who already pay for ChatGPT and want the coding agent in that allowance, web apps and automations with local and cloud tasks, and a few focused coding sessions a week on Plus.
Replit is for learning by building a web app, script, or simple browser game in one place, people who want an IDE without installing one, and a project that needs hosting and a database next to the agent.
OpenAI Codex scores 1 out of 5 for someone who does not want to read code. Replit scores 4 out of 5. Replit has the higher no-code score. You are still in a coding agent. This is a poor pick if you never want to see a file. Agent can carry a beginner, and you are still looking at an IDE. Expect files.
OpenAI Codex: Free includes a limited Codex trial. OpenAI does not publish a fixed prompt count. It is enough to see the product, not to build through the month. Replit: Daily Agent credits and Free Mode with a daily cap, a built-in database, and one published project. The pricing page does not state one universal credit number.