kitio.aiOpenAI Codex vs Exists
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. OpenAI Codex starts at $8/mo and Exists starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Cloud coding tasks
- Codex CLI
- IDE extension
- Desktop app
- Automatic PR review
- Text-to-game generation
- Automatic world generation
- Multiple game genres
- Team and vehicle editing
- Cinematic rendering tool
| Feature | OpenAI Codex | Exists |
|---|---|---|
| Best for | OpenAI's coding agent in the cloud, CLI, IDE and desktop app | Create playable multiplayer 3D games from a text prompt |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | $8/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | OpenAI | Exists |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
OpenAI Codex starts at $8/mo and Exists starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
6 plans
Free
Free
- Limited Codex usage
- Via ChatGPT account
Go
$8/mo
- ChatGPT Go plan
- More Codex usage than Free
Plus
$20/mo
- ChatGPT Plus plan
- Codex in CLI, IDE and cloud
Pro
$100/mo
- Starting price; $200 and $500 tiers
- Highest Codex limits
Business
$25/mo
- Per user
- Shared workspace and admin controls
Enterprise
Contact sales
- Enterprise security
- Flexible usage
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
OpenAI Codex
- Included in ChatGPT plans
- Runs many tasks in parallel
- Open-source CLI
- Token-based limits are hard to predict
- Free tier usage is small
Exists
- No coding or game engine needed
- Games are multiplayer by default
- Runs fully in the browser
- Limited to a set of game genres
- No public pricing details
- Less control than a real game engine
Which one should you choose?
Choose OpenAI Codex if you want:
- Included in ChatGPT plans
- Runs many tasks in parallel
- Open-source CLI
Watch out: token-based limits are hard to predict.
Choose Exists if you want:
- No coding or game engine needed
- Games are multiplayer by default
- Runs fully in the browser
Watch out: limited to a set of game genres.
OpenAI Codex vs Exists FAQ
What is the difference between OpenAI Codex and Exists?
OpenAI Codex: OpenAI's coding agent in the cloud, CLI, IDE and desktop app. Exists: Create playable multiplayer 3D games from a text prompt. Both are coding tools.
Is OpenAI Codex or Exists cheaper?
OpenAI Codex starts at $8/mo and Exists starts at See pricing page. Check both pricing pages for current plans.
Do OpenAI Codex and Exists have free plans?
OpenAI Codex: Yes. Exists: Yes.
Who makes OpenAI Codex?
OpenAI Codex is made by OpenAI, based in United States.
Who makes Exists?
Exists is made by Exists.
Which should I choose, OpenAI Codex or Exists?
Choose OpenAI Codex if you value included in chatgpt plans and runs many tasks in parallel. Choose Exists if you value no coding or game engine needed and games are multiplayer by default.